That's the work that the system is doing to the environment. I'm doing work to the environment. The work is negative, which means that work is being done to the environment.

功的大小,就是矩形的面积,这样我们就实现了一台热机，冷却，加热，加热,冷却，系统回到了初态。

麻省理工公开课 - 热力学与动力学课程节选

Also, you'll notice that the size of the body part represented in the brain does not correspond to the size of the body part in the real world.

而且你会发现,身体部位在大脑中对应的皮层面积大小,与身体部位的实际大小并不一致

耶鲁公开课 - 心理学导论课程节选