Research on open loop control of BLDC driving air compressor;
研究非线性振动系统中混沌的开闭环控制问题。
It is certain that if there are fewerpeople driving, there will be less air pollution.
可以肯定，如果开车的人少一些，空气污染就一定会减少。 。
To cut down air pollution, we should take the bus or subway instead of driving.
为了减少空气污染，我们应该乘坐公共汽车或者地铁，而不是开车。
Moreover they like driving big cars, while air pollution is already bad.
而且他们喜欢开大排量的车，北京的空气已经这么差了。
Moreover they like driving big cars, while air pollution is already bad.
而且他们喜欢开大排量的车，北京的空气已经这么差了。
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