plagiarist

例句：

1. 1. The student was accused of plagiarizing from his classmates during the exam.
   学生被指控在考试中抄袭同学的答案。
2. 2. The professor warned against plagiarism in academic writing.
   教授警告说，学术写作中要避免剽窃。
3. 3. The researcher found that many papers were plagiarized from reputable sources.
   研究者发现，许多论文是从信誉良好的来源剽窃的。