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电能开关是控制能流方向的元件。
And the power switches are used to control the direction of power flow.
youdao
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译：二极管是一种只允许电流以一个方向流过的元件。
Diodes are components that allow current to in only one direction.
youdao
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译：二极管是一种只允许电流以一个方向流过的元件。
Diodes are components that allow current to in only one direction.
youdao