Oxygen passes through the incredibly thin walls of the alveoli into the capillaries and is then carried back to the heart via the pulmonary veins.

氧气穿过无数肺泡的薄壁进入毛细血管中，随后经肺静脉带到心脏。

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We move forward, like boats sailing against the wind and the waves, but all the time we are carried back into our past.

我们像航船逆风逆浪而行一样前进，但我们却一直被拉回到我们往昔的岁月中。

youdao

We move forward, like boats sailing against the wind and the waves, but all the time we are carried back into our past.

我们像航船逆风逆浪而行一样前进，但我们却一直被拉回到我们往昔的岁月中。

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