他们吸入氧气，将糖转化成能量，并释放二氧化碳。

They're taking in oxygen to help them convert sugars into energy, and releasing carbon dioxide.

youdao

他们吸入氧气，将糖转化成能量，并释放二氧化碳。

They're taking in oxygen to help them convert sugars into energy, and releasing carbon dioxide.

youdao