一种有很短直径的管道；通过毛细管作用来盛液体。
A tube of small internal diameter; holds liquid by capillary action.
在每一肺泡周围有许多毛细管，它们是很小的血管。
Around each alveolus there are capillaries, which are very small blood vessels.
一种有弹性的管道，例如动脉、血管或毛细管，血液通过它们进行循环。
An elastic tubular channel, such as an artery, a vein, or a capillary, through which the blood circulates.
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