Then, after you define what your system is, whatever is left over of the universe is the surroundings.

当你定义了你的系统后，宇宙的其余部分,就是环境。

麻省理工公开课 - 热力学与动力学课程节选

We just had one after another; the banking system kept collapsing.

我们一次又一次地经历着；,银行系统持续崩塌着。

耶鲁公开课 - 金融市场课程节选

Here, I've just picked a couple of the pictures that I showed you last time when we were talking about cell communication in the immune system, What happens after the vaccine is introduced into your body is that it initiates cellular events.

我挑选了,我上次给你们展示的几幅图片,当我们讨论到,免疫系统中的细胞沟通时,讲到过当人体接种疫苗之后,能够触发,细胞活动

耶鲁公开课 - 生物医学工程探索课程节选