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You must buckle your seat belt in a plane before it takes off.
在飞机起飞之前，你一定要扣紧安全带。
youdao
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Wear your seat belt any time you travel in an automobile. Insist all occupants buckle up.
任何时候乘坐汽车，都应系好安全带。确保车上所有人都扣好安全带。
youdao
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Buckle up. Fasten your seat belt.
扣好你的安全带。
youdao
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Buckle up. Fasten your seat belt.
扣好你的安全带。
youdao