There's no need to turn on the light.

不用开灯.

《现代汉英综合大词典》

Will you show me how to turn on the light?

你可以告诉我怎么开灯 吗 ?

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Please turn on the light switch.

请把电灯开关拉开.

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Mr. Brown jumped off the bed and tried to turn on the light.

布朗先生跳下床开灯,但是停电了,灯不亮.

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The candle's flame core has been used up, turn on the light, please!

蜡烛的焰心烧完了, 你去开灯吧!

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Fear grows in darkness; if you think there's a bogeyman around, turn on the light.

忧惧根植在黑暗中; 假使你想像附近有吓人的鬼怪, 就开灯吧.

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