It is dangerous to lean out of the window while the bus is in motion.

行车时探身窗外是危险的.

《现代汉英综合大词典》

Don lean out of the window of the bus. It's dangerous.

在公共汽车上别探出窗外, 太危险了.

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Passengers are requested not to lean out of the carriage windows.

请旅客们不要把头伸到窗外面去.

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It is dangerous to lean out of the window.

头伸出窗外是很危险的.

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Don't lean out of the window while the bus is in motion.

公共汽车在开动时,不要探身窗外.

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You must n't lean out of the window while the car's moving.

车子前进的时候,你不能把身体探出窗外.

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To lean out of the car's window is dangerous.

把头伸出车窗外是伤害的.

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It's dangerous and unlawful for passengers to lean out of the windows of railway carriages.

乘客在火车车厢探身窗外既危险又违法.

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