Traditional: 開關
开关 (kāi guān) means “power switch; gas valve; to open the city (or frontier) gate; to open and close; to switch on and off”. It is an HSK 6 Chinese word (traditional 開關) in the HSK 3.0 vocabulary.
请把灯的开关关上。
Qǐng bǎ dēng de kāi guān guānshang.
Please turn off the light switch.
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