detail pen for double lines

例句：

1. 1. Theteacher asked the students to detail their homework.
   老师要求学生们详细描述他们的作业。
2. 2.He detailed the plan for the project in great detail.
   他非常详细地描述了项目的计划。
3. 3.She detailed her experience of traveling abroad in a letter.
   她用一封信详细叙述了她的国外旅行经历。