keyt[计] 关键字, 关键码, 密钥, 键, 电键, 主要的, 关键的keyn.键；关键；钥匙；答案adj.关键的；主要的vt.键入；用钥匙锁上；为 ... 调音key verifier发报检验器Key Protocol密钥协议key function关键函数key subjects重点学科keying cycle键控周期keying board键盘凿孔板keying relay键控继电器key schedule密钥次序表keyseat rule铣槽尺Keyouzhongqi科尔沁右翼中旗

1. For some reason our gas supply has been shut off.
   我们的瓦斯供应不知道什么理由给切断了。
2. It was the work of a moment to cut off the light.
   切断电源是易如反掌的事。