信拉皮迪：下一个大的担心是空气中的氧气不足。

FAITH LAPIDUS: the next big worry is the lack of oxygen in the air.

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他们也说，人民需要的氧气不足时，心脏是在休息。

They also say people need less oxygen when the heart is at rest.

youdao

他们也说，人民需要的氧气不足时，心脏是在休息。

They also say people need less oxygen when the heart is at rest.

youdao