The paper presents a new PWM CSI using only one gate turn off switch and six thyristors. The converter uses active commutation to realize PWM in a conventional thyristor-based CSI.

该文提出一种采用一个门极可关断开关和六个晶闸管的新的PWM电流源逆变器，此电路通过有源换流来实现传统的晶闸管CSI的脉宽调制。

youdao

Which switch do I press to turn it off?

我按哪个开关就能把它关了？

《牛津词典》

You don't need a light switch or a light bulb or an iPhone app to turn something on or off.

你不需要电灯开关、灯泡或苹果手机应用程序来打开或关闭某些东西。

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Of course, to turn the on-off switch on is harder when somebody's in a coma.

当然要开启这个开关难度更大,当人陷入昏迷。

耶鲁公开课 - 死亡课程节选

You don't need a light switch or a light bulb or an iPhone app to turn something on or off.

你不需要一个电灯开关,或者一个电管,或者打开关闭一个iPhone应用程序。

哈佛公开课 - 计算机科学课程节选

Users can turn Lykka off or switch to a different avatar if they like.

CNN: Review: MacSpeech demos voice recognition

The Olympian, Dame Mary Peters, has been asked to turn off the analogue switch at the Divis transmitter in Belfast.

BBC: Digital Switchover

When a couple knows how to turn off the business switch and enjoy their personal lives, they are one step ahead of the game.

FORBES: Going Into Business With Your Spouse: Do Or Die?