OK, to work. A word of warning: fasten your seat belts.

好了，开始工作，一些警告的话：,系紧你们的安全带。

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Especially in the United States, it's a law that you have to wear your seatbelt.

尤其在美国，法律规定开车时必须系好安全带。

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Make sure you fasten your safety belts.

一定要系好安全带。

Make sure 课堂 - SpeakingMax英语口语达人