expunctuation

例句：

1. 1. The sentence needs an appropriate punctuation mark to make it complete.
   这句话需要一个适当的标点符号来完成。
2. 2.He carefully placed the pen at the end of the paper for proper expunctuation.
   他小心地把笔放在纸的末尾，以便正确标点。
3. 3. The teacher asked the students to correct their work by adding proper punctuation.
   老师要求学生们通过添加正确的标点来修改他们的作业。