The colder that lower operating temperature is, the more efficient the ideal version of the engine is.

其最低工作温度越低， 理想发动机版本的效率越高。

Which can help if you don’t know an engine’s input and exhaust heats, but you know its operating temperatures.

如果您不知道发动机的输入和排气热量， 但您知道它的工作温度， 这会有所帮助。

Which can help if you don't know an engine's input and exhaust heats, but you know its operating temperatures.

如果您不知道温度，这可能很有用 引擎添加和耗尽，但你知道两度。

So, for an ideal fridge, the coefficient of performance would be equal to: the lower operating temperature, divided by the higher operating temperature minus the lower operating temperature.

因此，对于理想的冰箱，性能因素为： 最低工作温度。

The US space agency NASA is trying to determine why one of the four big engines at the base of its new rocket Artemis I didn't cool down to the required operating temperature before a planned launch on Monday.

美国国家航空航天局的新火箭“阿尔忒弥斯1号”计划在周一发射，但在这之前，其四个大发动机中的一个没有冷却到所需的工作温度，该宇航局正在尝试找出原因。