D: It's no mystery, Yael. Those spots are a natural part of the ripening process. You see, just like all fresh produce, your bananas are alive.They're taking in oxygen to help them convert sugars into energy, and releasing carbon dioxide. This process is called respiration.
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They're taking in oxygen to help them convert sugars into energy, and releasing carbon dioxide.
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.
它们不断地吸收氧气来并把糖类转换成能量，释放出二氧化碳。
As we said, these hydrothermal vents are releasing into the ocean depth this intensely hot water that contains a chemical called hydrogen sulfide, and also a gas, carbon dioxide.
正如我们所说，这些热液喷口正在向海洋深处释放这种强热的水，含有一种叫做硫化氢的化学物质，和一种气体，二氧化碳。
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