part-of-speech tagging

例句：

1. 1. The teacher asked the studentsto participate in the class discussion.
   老师要求学生参与课堂讨论。
2. 2. The researcher conducteda survey to gather data for their study.
   研究员进行了一项调查，以收集数据供其研究之用。
3. 3. Thewriter analyzed the results ofthe experiment to draw conclusions.
   作家分析了实验结果，以得出结论。