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一、先说清楚：不是所有标红都要一样改

很多学生第一次看到iThenticate报告的反应是：满屏红，慌了。

ithenticate 检测提交地址：

http://www.zaojiance.net/iThenticate/

别慌。不同位置的标红，处理方式完全不同。

我按实际情况分成四类，你对照着来：

下面逐一说，每一类都会给出真实案例。

二、A类：方法部分的标准操作（最容易重复，也最好改）

为什么容易重复？

实验方法就那些固定步骤。“细胞在37℃、5% CO₂的培养箱中培养”“样品以12000 rpm离心10分钟”——全世界写出来都差不多，iThenticate当然会标红。

改法：换顺序、换说法、不要换术语

不要做的事：

• 把“离心”改成“使样品经历离心过程”（啰嗦，没意义）

• 把“37℃”改成“三十六摄氏度”（弱智）

正确做法：

策略1：调整句子结构

改前（标红）：

Cells were cultured in DMEM medium supplemented with 10% fetal bovine serum and 1% penicillin-streptomycin at 37°C in a 5% CO₂ incubator.

改后：

DMEM medium containing 10% FBS and 1% penicillin-streptomycin was used for cell culture. Cells were maintained at 37°C under 5% CO₂.

重复率变化：这段从95%降到约40%（剩余40%是因为专业术语无法避免，期刊能接受）。

策略2：主动变被动，或者反过来

改前：

We measured the protein concentration using the BCA method.

改后：

The BCA method was employed to determine protein concentration.

策略3：长句拆短句

改前：

After washing three times with PBS, the cells were fixed with 4% paraformaldehyde for 15 minutes at room temperature and then permeabilized with 0.1% Triton X-100.

改后：

Cells were washed three times with PBS. Then they were fixed with 4% paraformaldehyde for 15 minutes at room temperature. After fixation, cells were permeabilized using 0.1% Triton X-100.

策略4：把步骤写成表格或流程图

如果你的方法部分有连续5步以上的操作流程，直接写成表格或流程图。文字少了，重复率自然降。很多期刊也欢迎这种格式，更清晰。

真实案例前后对比：

改前（132个词，iThenticate匹配4篇不同文献，最深的一篇匹配度91%）：

Total RNA was extracted from tissue samples using TRIzol reagent according to the manufacturer's instructions. RNA concentration and purity were determined by measuring absorbance at 260 nm and 280 nm using a NanoDrop spectrophotometer. RNA integrity was assessed by agarose gel electrophoresis. First-strand cDNA was synthesized from 1 μg of total RNA using a reverse transcription kit. The reaction mixture was incubated at 25°C for 10 minutes, followed by 50°C for 60 minutes, and then 85°C for 5 minutes to terminate the reaction.

改后（118个词，匹配度降到34%，主要是术语导致的残留）：

TRIzol reagent was used for total RNA extraction from tissues, following the manufacturer's protocol. A NanoDrop spectrophotometer measured RNA concentration and purity via 260/280 nm absorbance ratios. RNA integrity was checked on agarose gels. For cDNA synthesis, 1 μg of RNA served as template in a reverse transcription reaction. The thermal profile was: 25°C for 10 min, 50°C for 60 min, and 85°C for 5 min.

改了啥：

• 被动变主动，主动变被动（来回换）

• “according to the manufacturer's instructions” → “following the manufacturer‘s protocol”

• 把三个温度步骤整合成一句话

• 调整了数据呈现的顺序

结果：这132个词的段落，重复率从91%降到34%，期刊编辑没有提出任何疑问。

三、B类：专业定义和固定术语（基本不能改，用引用解决）

典型例子

“Apoptosis is a form of programmed cell death that occurs in multicellular organisms.”

这句话，你怎么改？“细胞凋亡是一种在多细胞生物中发生的程序性细胞死亡形式”——翻来覆去就这几个词。你改成“细胞凋亡指的是多细胞生物体内出现的程序化细胞消亡现象”，反而别扭。

正确做法：别硬改，用引用

方法1：直接引用，加引号和出处

According to Kerr et al. (1972), “apoptosis is a form of programmed cell death that occurs in multicellular organisms.”

加了引号和出处，iThenticate虽然还会标红，但编辑一看就知道你是规范引用，不会算你抄袭。

方法2：用自己的话引出定义，不完全照抄

改前：

Apoptosis is a form of programmed cell death that occurs in multicellular organisms.

改后：

In multicellular organisms, programmed cell death takes place through a process known as apoptosis.

匹配度从100%降到60%左右，再配上引用，就没问题了。

原则：这类内容的降重目标不是0%，而是降到让编辑看得出你理解了、不是无脑复制粘贴。

四、C类：别人的研究结论（必须彻底改写）

这是最需要花功夫的地方。你不能直接把别人论文里的结论抄过来换个词就完事。

错误示范（很多人这么干）

原文（某论文）：

Our findings demonstrate that PD-L1 expression is significantly associated with poor overall survival in patients with non-small cell lung cancer.

你以为改了：

Our results show that PD-L1 expression has a significant correlation with unfavorable overall survival in NSCLC patients.

iThenticate一查：还是80%重复。因为核心词和句式结构没变。

正确做法：改变叙述角度和信息组织方式

策略1：从“报告结果”变成“总结规律”

改前（别人的结论）：

PD-L1 expression was found to be an independent prognostic factor for overall survival.

改后：

Among the factors examined, PD-L1 expression emerged as one that independently predicts overall survival duration.

策略2：合并多个来源的结论

不要盯着一篇改。把三篇相关文献的结论揉在一起说。

改前（只抄一篇）：

Smith et al. reported that PD-L1 expression correlates with poor prognosis.

改后（揉三篇）：

Multiple studies have linked PD-L1 expression to worse clinical outcomes. Specifically, Smith et al. observed a correlation with overall survival, while Jones et al. found an association with disease-free survival, and Lee et al. reported similar findings in a larger cohort.

这样写，每家的内容只占一小部分，整体重复率自然降下来。

真实案例前后对比：

改前（85个词，来自某篇文献的讨论部分，iThenticate单篇匹配度87%）：

The results indicate that the newly synthesized compound inhibits cell proliferation by inducing G1 phase arrest and promoting apoptosis through the mitochondrial pathway. This effect is mediated by downregulation of cyclin D1 and upregulation of Bax.

改后（103个词，匹配度降到31%）：

Cell cycle analysis revealed an accumulation of cells in G1 phase following compound treatment, accompanied by reduced cyclin D1 expression. Concurrently, markers of mitochondrial-mediated apoptosis, including increased Bax levels, were observed. These findings point to a dual mechanism: proliferation arrest through G1 blockage and cell death via the intrinsic apoptotic pathway.

改了啥：

• 不说“indicates”，说“revealed”“were observed”“point to”

• 不按原文顺序出牌：先说现象（G1期细胞增多），再说分子变化（cyclin D1减少），最后总结机制

• 加入了原文没有的连接词（Concurrently，These findings point to）

结果：同样的事实，不同的话说出来，重复率从87%降到31%，而且表达反而更清晰了。

五、D类：自己的已发表内容（很多人栽在这里）

你可能觉得：我自己以前发的论文，现在再写一遍，不算抄袭吧？

算。iThenticate不管是谁写的，只管文字是不是一样的。

这叫“自我剽窃”（self-plagiarism），期刊同样不接受。

改法：重新组织，而不是重新打字

错误做法：把以前论文里的那段话抄过来，改了三个词。

正确做法：想想“我现在有了新的数据/新的视角，同样一个背景知识，我能不能用不同的方式说出来？”

比如你以前写的是：

In our previous study, we established that X protein activates Y signaling pathway.

现在可以改成：

Building on our earlier work showing X protein‘s role in Y pathway activation, the current study further investigates…

加上了“Building on”“the current study further investigates”，把过去的研究定位成铺垫，而不是重复叙述。

如果不能改（比如必须引用自己的方法部分），那就明确写清楚：

The experimental procedures were similar to those described in our previous publication (Author, year), with the following modifications: …

明确告知编辑“这部分我之前写过，现在引用了”，编辑一般能接受。

六、不同重复率区间的降重目标

给你一个参考标准，看你改到什么程度可以投：

注意：单篇重复率比总重复率更重要。总重复率15%但有一篇来源占了8%，比总重复率22%但均匀分布在10个来源里更危险。期刊编辑会认为你“主要抄了那一篇”。

七、快速降重的几个实用技巧

技巧1：先删后改

重复率高的段落，先问问自己：这段话是不是必须存在的？如果是套话、废话、人人都知道的常识，直接删掉比费劲改更省事。

技巧2：改形容词和副词

原文：The results clearly demonstrate that…
改后：The findings suggest that…

“clearly demonstrate”太扎眼，换成“suggest”柔和得多，也少了三个字母的重复机会。

技巧3：英文论文的话，去Grammarly跑一遍

Grammarly的改写功能有时候能提供意外的新句式。但别全信，它不懂你的专业内容，只懂语法。

技巧4：把长段拆成短句，或把短句合并

iThenticate是连续6个单词匹配就算重复。你把句子拆开，中间的标点会打断连续性。

原文（连续15个词匹配）：

Treatment with drug A resulted in a significant reduction of tumor volume compared to the control group.

拆成两句：

Drug A treatment reduced tumor volume. This reduction was significant relative to controls.

第一句匹配率低（关键词少），第二句也低。合在一起反而高。

技巧5：用同义词，但别过度

能用：

• “showed” ↔ “demonstrated” ↔ “indicated” ↔ “revealed”

• “increase” ↔ “elevate” ↔ “enhance” ↔ “promote”

不能用：

• “PCR” ↔ “polymerase chain reaction”（可以偶尔用全称，但通篇换来换去很奇怪）

• “cell” ↔ “cellular unit”（没人这么说）

八、真实完整案例：一段文字从32%降到9%

这是一段真实论文的引言部分，修改前后对比：

改前（重复率32%，主要匹配到一篇2019年的综述）：

The mitogen-activated protein kinase (MAPK) signaling pathway plays a critical role in regulating cell proliferation, differentiation, and survival. Aberrant activation of this pathway has been implicated in the development and progression of various human cancers. Previous studies have shown that targeting key components of the MAPK pathway, such as MEK and ERK, represents a promising therapeutic strategy.

改后（重复率9%）：

Cell growth, specialization, and longevity are controlled in part by a signaling cascade known as the MAPK pathway. When this system becomes overactive, it contributes to tumor formation and spread across multiple cancer types. As a result, researchers have focused on interrupting the pathway at critical nodes—particularly MEK and ERK—as a potential treatment approach.

改了啥：

• “plays a critical role in regulating” → “are controlled in part by” （从主动变被动，从“角色”变“被控制”）

• “cell proliferation, differentiation, and survival” → “cell growth, specialization, and longevity” （换了三个同义词）

• “Abnormal activation” → “overactive” （更短的表达）

• “has been implicated in the development and progression” → “contributes to tumor formation and spread” （更直接，更短）

• “Previous studies have shown that targeting” → “researchers have focused on interrupting” （改变动作主体和动词）

• “represents a promising therapeutic strategy” → “as a potential treatment approach” （简化结尾）

结果：32% → 9%，单篇匹配最高只有2%，全文没有丢失任何核心信息。编辑没有对重复率提出任何质疑。

九、一句话总结

查出来重复别慌。方法部分的标红可以微调句式，专业定义可以加引用，别人的结论要彻底改写成自己的话，自己的已发表内容也要重新组织。改的时候记住：先删废话，再调整语序和句式，最后换同义词。目标是降到单篇重复率3%以下、总重复率15%以下，不是降到0。降到0既不现实也没必要。

ithenticate 检测提交地址：

http://www.zaojiance.net/iThenticate/