Urban environments can speed up the process of evolution.
城市环境能够加速进化过程。
With increasing shaft speed of rotation, heat evolution and temperature rise become a critical problem.
由于轴的转速越来越高，轴承的发热和温升是个突出矛盾。
With increasing shaft speed of rotation, heat evolution and temperature rise become a critical problem.
由于轴的转速越来越高，轴承的发热和温升是个突出矛盾。
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