单词：switch on
[化] 接通
switch on的用法和样例：
例句
- The collimator lighting remains also switched on.准直仪照明仍然保持开启。
- A well-used door needs no oil on its hinges.一记扇经常开启的门的绞链不需要润滑油。
词汇搭配
- switch on(用开关)开启...
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