名词
中文翻译：预热过程同义词
同义词：
['preheating', 'preheating stage', 'preheating phase']
例句：
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1. The car needs to be preheated before it can start.
汽车在启动前需要预热。
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2. During the preheating process, the temperature should be gradually increased.
预热过程中，温度应该逐渐升高。
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3. The engineers carefully preheated the metal parts before welding them together.
工程师们仔细地预热金属部件，然后将其焊接在一起。