氧的循环包含氧化和还原。

The oxygen cycle involves both oxidation and reduction .

youdao

氧的循环包含氧化和还原。

The oxygen cycle involves both oxidation and reduction.

youdao

笑会造成心脏和血液循环功能的短期变化，增加心率和耗氧量。

Laughter produces short-term changes in the function of the heart and blood circulation, increasing heart rate and oxygen consumption.

youdao

The red blood cells that carry oxygen only live within your circulation for about a month and so you have to continually be replacing cells that are dying and so there are cells that are proliferating.

携带氧的红细胞,在你的循环系统中的寿命只有一个月,因此你必须持续不断地更新衰老的细胞,所以就有在增殖的细胞

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