1. The teacher started the class with introductions. 老师在课堂开始时让大家做自我介绍。
2. We exchanged introductions before the meeting began. 会议开始前我们互相做了介绍。
3. His introductions helped everyone feel more comfortable. 他的介绍让大家感觉更自在。
4. The book has a long introductions section. 这本书有一个很长的引言部分。

A: We should begin with introductions. A：我们应该先做自我介绍。

B: Yes, introductions will help everyone know each other. B：是的，自我介绍可以帮助大家互相了解。

1) 社交场合中相互介绍身份的行为
2) 演讲或书籍开头的引言部分
3) 正式会议中的人员介绍环节
4) 初次见面时的自我说明过程

1. 介绍；引言；序言

e.g. The meeting began with introductions. 会议以相互介绍开始。

2. 自我介绍或相互介绍的行为

e.g. Everyone gave their introductions to the group. 每个人都向小组做了自我介绍。

noun

1. The act of presenting people to each other or the beginning section of a book, speech, or event that explains basic information.

Synonym: presentation, opening, overview