The boundary is impervious to transfer of heat like a thermos Anything that happens inside of the thermos is an adiabatic change because the thermos has no connection in terms of energy to the outside world.

边界不能传递热量,像热水瓶一样,热水瓶里发生的任何事,都是绝热变化,因为热水瓶与外部世界,没有能量方面的联系。

麻省理工公开课 - 热力学与动力学课程节选

One of the most significant barriers to people doing things in the world, to actually introducing change is that they underestimate their ability to bring about change.

人若想在世间有所为,真正实现改变，面对的最显著障碍之一,是他们低估自己实现改变的能力。

哈佛公开课 - 幸福课课程节选

He is also saying that the birth of Christ in Bethlehem was a nightmare for the world it altered, the world that it changed utterly a change that Yeats sees as the end now of the Christian Era and not its fulfillment.

他还说,基督在伯利恒的诞生,是一个噩梦，因为世界因此改变，彻底变了,叶芝把这个改变,看作基督时代的终结,而不是它的圆满。

耶鲁公开课 - 现代诗歌课程节选