So, that's a homogeneous system, one phase. You have to know if your system is an equilibrium system or not.

所以这是个均匀系统，只有一个相，你得知道你的系统,是不是个平衡系统。

麻省理工公开课 - 热力学与动力学课程节选

You have to have a good public transportation system when you have as many people here as we do.

如果你那儿和我们这儿的人一样多，你们得有一个良好的公共交通系统。

纽约的交通手段 - SpeakingMax英语口语达人

You have to inject it multiple times because the first blip that you get in immune response is not very high, you have to boost and often you have to boost again in order to get a high enough response to be protected.

你必须得进行多次注射,因为第一次注射,无法使免疫系统产生强烈反应,你得要增强免疫,通常还得再增强一次,以使反应足够强烈,从而起到保护作用

耶鲁公开课 - 生物医学工程探索课程节选

We had no idea what was going on with the system, with how people were using it. We were making guesses.

我们不知道这个系统会怎么样，也不知道人们用得怎么样，我们只是在猜测。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

They didn't succeed; we still had banking crises so the system didn't seem to work very well.

它们没有取得成功；,我们仍然存在银行业危机,所以这个系统似乎运行得不怎么好。

耶鲁公开课 - 金融市场课程节选