Check all your wiring before switching on the current.

开启电流前检查所有的电线路.

《简明英汉词典》

I see no need switching on the air - conditioner in such weather.

这种天气我看没什么必要开 空调.

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When switching on the switch, the conductive plate resiliently contacts the terminal.

当转开关时, 导电板弹性接触的终端.

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Connecting an ear piece or switching on speakerphone will reduce radiation exposure.

耳机通话和免提都可以减少辐射.

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On deck ( switching on exciter )

接通板 ( 接通激励器 )

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The asymmetric electromagnetic transient process after switching - on two phase supply is studied in the paper.

该文研究接入两相电源后的不对称电磁过渡过程.

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That means switching on the telephone answering machine and shutting off the television.

这意味着接通录音电话和关闭电视机.

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