talk-listen switch

例句：

1. 1. The talk-listen switch on the phone is very useful.
   电话上的交谈开关非常实用。
2. 2. The new car has a great talk-listen switch for adjusting the volume.
   这款新车有一个很棒的交谈开关来调整音量。
3. 3. The engineer tested the talk-listen switch to make sure it worked properly.
   工程师测试了交谈开关以确保它正常工作。