dead key

例句：

1. 1. The computer's keyboard has a lot of dead keys.
   这台电脑的键盘有很多死键。
2. 2.The old phone had a dead key that wouldn't turn on.
   旧电话有一个死键，开不了机。
3. 3.The door was stuck and the dead key wouldn't open it.
   门卡住了，死键也打不开。