Let's start by looking at aerobic respiration.

让我们从有氧呼吸开始讲吧。

Aerobic respiration happens all the time in all cells, usually in the mitochondria.

有氧呼吸每时每刻都在细胞中发生，通常在线粒体中。

You can hopefully see that aerobic respiration works in the opposite way to photosynthesis.

你可以看到有氧呼吸与光合作用相反。

Aerobic respiration releases energy in cells by breaking down food substances whilst in the presence of oxygen.

有氧呼吸通过在有氧的情况下分解食物物质来释放细胞中的能量。

Animals need oxygen to carry out aerobic respiration, and they need to get rid of the other waste product called carbon dioxide.

动物需要氧气来进行有氧呼吸，它们需要排出另一种叫做二氧化碳的废物。