空气在进入气管前被加热了，在气管的底部分成两个导气管通向每一侧的肺，这两人分支被叫做支气管。
The air is warmed up before passing down the windpipe, where it's divided at the bottom between two airways called bronchi that lead to either lung.
在移植级别的手术室中，替换一个支气管（主气管的分支，通入到肺中）听起来与在一个新的心脏中搭桥相比，一点也不困难。
IN THE hierarchy of transplant surgery,replacing a bronchus (the passage from the main windpipe, the trachea, into alung) does not sound difficult compared with, say, plumbing in a new heart.
左、右支气管是从气管分支出来，它使氧气更加深入的到肺里。
The left and right bronchi branch off from the trachea and carry oxygen further into the lungs.
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