At the docks, my father carried boxes from dawn until midday, when it got too hot too work.
在码头上，我父亲从黎明开始搬箱子，直到中午天气太热不能干活为止。
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It controlled a trap door between the boxes and allowed only fast-moving (ie, hot) molecules through in one direction and only slow-moving (ie, cold) ones through in the other.
The chartered corporate jet will provide fine dining, a far cry from the hot chips, chicken nuggets, hot dogs…snack boxes and more! offered in economy class (if passengers can get a meal at all).