answer back key

例句：

1. 1. The teacher asked the students toanswer back during the test.
   老师在考试期间要求学生回答问题。
2. 2. The student used theanswer back key to correct his mistakes.
   学生使用回键来纠正他的错误。
3. 3. Thecomputer keyboard has an answer back key thatallows you to quickly reply to messages.
   计算机键盘有一个回键，可以让你快速回复信息。