太阳在长期内也是变化的：它的热量输出在周期中有上升，也有下降，最近的趋势是下降。

The sun, is also variable over a long term: its heat output goes up and down in cycles, the latest trend being downward.

youdao

一组微小的顺电材料可以感知一个人发出的热量，然后利用该阵列的电输出模式构建图像。

An array of tiny pieces of paraelectric material can sense the heat radiated by a person, and the pattern of the array's electrical outputs can then be used to construct an image.

youdao

控制体重比控制热量输入而不是输出多90%。

Weight control is more than 90% about controlling calorie input, rather than expenditure.

youdao

It makes sense, right, because you know we got less work out and delta u is the same right, so it must be that less heat got transferred.

这是显而易见的，因为输出的功更少,且Δu相等，所以需要的热量更少。

麻省理工公开课 - 热力学与动力学课程节选