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。
The evolution of heat from the sun is inestimable.
从太阳中放射出的热是无法估计的。
After a few seconds a reaction occurs with evolution of heat and separation of water.
几秒钟后会发生反应的热量和水分离的演变。
After a few seconds a reaction occurs with evolution of heat and separation of water.
几秒钟后会发生反应的热量和水分离的演变。
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