按照法律规定，所有乘客都必须系安全带。

By law, seat belts must be worn by all passengers.

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但是只有38%的贫穷国家要求前位和后位乘客均要系好安全带。

Yet only 38% of poor countries ask both front - and back-seat passengers to wear seat belts.

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而在几分钟的失重时间里，我们则鼓励乘客松开安全带自由飘浮。

In the few minutes of weightlessness, passengers will be encouraged to shed their seat belts and float around.

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