名词
中文翻译：预热允许量
同义词：
['预热余量，预热容差例句：1. The machine requires a preheating allowance of 2 hours before it can operate.（这台机器在开始工作前需要预热2小时。）']
例句：
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1. The machine requires a preheating allowance of 2 hours before it can operate.
这台机器在开始工作前需要预热2小时。
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2.The pilot had to make a quick decision about the preheating allowance for the flight.
飞行员必须迅速决定飞行的预热允许量。
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3. The engineer carefully checked the preheating allowance before starting the engine.
工程师在启动发动机前仔细检查了预热允许量。