The thermos, with the lid on top, It's not a open system your coffee is going to stay warm or hot in the thermos.

顶部盖了盖子的热水瓶，不是开系,你希望你的咖啡在热水瓶里面保持温暖,或滚烫。

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They have these things called tiger tails which you like, tie onto your pants and it's like "I'm a little tiger."

他们有这些被称作“老虎尾巴”的东西，当你把它系到你的裤子上，你自己就仿佛是只“小老虎”。

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So, remember when you're looking at your periodic table, don't forget about the lanthanides, sometimes they come into play.

因此，要记住，当你在看元素周期表时，不要忘了镧系元素，有时候也会用到它们。

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And if you remember this phrase, I don't know why you would, but this will help you learn the lanthanides in order.

如果你能记得这句话的话，我不管你们是怎么做到的，但是这个确实会帮助你按顺序记住镧系元素。

麻省理工公开课 - 固态化学导论课程节选

Let's say your little brother is just learning how to tie his shoes.

假设你的弟弟正在学习怎么系鞋带。

Don't 课堂 - SpeakingMax英语口语达人

And the person you're with is not wearing their seatbelts.

你车上的朋友并没有系上安全带。

Make sure 课堂 - SpeakingMax英语口语达人