heated and cooled 加热和冷却
Objects expand when heated and contract when cooled.
物体热则涨,冷则缩。
One house is heated and cooled with geothermal energy.
一所房子是由地热能源供暖和制冷的。
The process of heat treating is the method by which metals are heated and cooled in a series of specific operations that never allow the metal to reach the molten state.
金属热处理过程其实是一系列具体的操作,通过这些操作加热与冷却金属,但加热时进行控制,使得金属不达到熔融的状态。
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