Mister Chu said sunlight,and its heat, will bounce off a white colored roof.

VOA: special.2009.06.19

It either had work, got its heat from the surroundings, or it got worked on by the surroundings.

系统从环境中，得到热量。

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If I then put it back into its original condition, lower the heat say, temperature back to body temperature and reduce the pH down to seven again, the molecules will re-nature.

假如我把烧杯的温度恢复到初始状态,降低温度,温度降低到体温,将pH值降低到七,这些分子会复性

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