abr.

例句：

1. 1. The abr. is the first letter of the alphabet.
   abbr.是字母表的第一个字母。
2. 2. The abr.of the meeting is at 3 pm on Friday.
   会议的缩写时间是周五下午3点。
3. 3. The abr. of the conference is in Room 101.
   会议的缩写地点在101室。