And here, in an isothermal expansion, The bath is putting back the energy that the gas is expanding or using to expand, and so the energy is flowing back into the gas through the environment in the isothermal expansion.

而在等温膨胀中，恒温环境将气体膨胀对外做功,而损失的能量又返还回来，在等温膨胀中,能量从环境,流向系统。

麻省理工公开课 - 热力学与动力学课程节选

There are probably those of you in the class already who are outraged by things like the modern food environment, how much energy it takes to transport things from place to place, lack of concern with sustainability and issues like this, and you'd like to see social change.

在坐的各位当中可能已经有人,对目前的食品环境感到愤怒,很多能量浪费在食品相关的运输上,忽略了对可持续性的关心等问题,你可能希望社会会有所改变

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选