He ripped away a wire that led to the alarm button.

他把连接报警按钮的电线扯掉了。

《柯林斯英汉双解大词典》

The only button in the coach is OK, which you see on the wire going to End.

在 coach 中只有一个按钮 OK，可以看到，它位于到 End 的连线上。

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You'll usually go on the scanner seat first, the radiographer give you a button on the end of a wire, so if you have any concerns you can immediately alert the staff.

通常情况下，你可能首先要坐上扫描检查床，放射科医生会给你一个安装在线缆一端的按钮，所以如果你有任何忧虑你可以及时地向工作人员发出警报。

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