Compared with a variety of relatively common DC chopping circuit, this paper selects the triple H-bridge chopping circuit to drive DC motors and introduces its working principles.
本文针对微型电动汽车，在比较多种常用的直流斩波电路基础上，选择三重化桥式斩波电路作为功率变换器主电路并研究了其工作原理。
So it looks a lot less messy if we just draw our Lewis structure like this for h c n, where we have h bonded to c triple bonded to n, and then a lone pair on the nitrogen there.
这看起来整洁了不少,如果我们把氰化氢的路易斯结构画成这样的话，这样我们就有氢与碳之间的单键和碳与氮之间三键，然后还有一对孤对电子在氮这里。
So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.
比如，在这下面我写的是氮分子2,而这个是氢分子，但我在上面把这些分子的形式改写了，大家可以看到,这是一个氢与氢之间的单键，含一个氮与氮之间的三键。
Second, it has a triple strand DNA architecture generated by the synthesis of a short piece of the H strand which is highly sensitive to oxidative damage due to its single strand condition.
线粒体DNA不同步的D环复制形式导致了控制区局部形成三链结构，其单链的构造使其更易受到过氧化物的损害。
Awkwardness with a cabby was the least of my concerns when a taxi I was in recently started lurching forward at 100 kilometers per hour (62 m. p. h. ), more than triple the road's speed limit.
近日，我乘坐的一辆出租车超过道路限速两倍有余，开始以上百公里的时速狂奔。 到了这时候，与司机之间是否气氛尴尬几乎不在我担心的事情之列。
Awkwardness with a cabby was the least of my concerns when a taxi I was in recently started lurching forward at 100 kilometers per hour (62 m. p. h. ), more than triple the road's speed limit.
近日，我乘坐的一辆出租车超过道路限速两倍有余，开始以上百公里的时速狂奔。 到了这时候，与司机之间是否气氛尴尬几乎不在我担心的事情之列。
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