But vaccines, and particularly in the last hundred years, vaccines have been one of the most important elements in our progress.

但是疫苗,尤其是在近一百年来,疫苗已经成为,感染性疾病防治进程中最重要的一环

耶鲁公开课 - 生物医学工程探索课程节选

You can say to them as you're sitting around, your birthday dinner, toasting "I'm glad to be with you."

当你们环桌而坐参加你的生日晚宴时，你可以举杯对他们说“I'm glad to be with you.”

I'm glad 课堂 - SpeakingMax英语口语达人

Milton had written in Areopagitica that he had actually met Galileo on his journey, when Milton was a young man and Galileo was a very old man, through the continent.

弥尔顿在中已经写到,他实际上在旅途中曾经遇到过伽利略，那还是当他是一个年轻人，而伽利略已然老去的，一次环陆旅行中。

耶鲁公开课 - 弥尔顿课程节选

They want to get as far away from each other possible, the ideal angle is 120. But what we have here is a four-membered ring, so what angle does 90° that have to be, that bond? 90 degrees.

它们想要尽量远离彼此，最理想的是形成120°键角,但现在是个四元环,所以这键角应该多大？

麻省理工公开课 - 化学原理课程节选

And orbiting around this is a lone electron out at some distance r.

有一个单电子,在环原子核的轨道上运行。

麻省理工公开课 - 固态化学导论课程节选

Today, they're a very important part of the fund's management framework.

如今,对冲基金是,基金管理体系的重要一环

耶鲁公开课 - 金融市场课程节选

But it was an important ambient.

这也是一个很重要的一环。

普林斯顿公开课 - 国际座谈会课程节选

Benzene is a ring that's made up of six carbon atoms and six hydrogen atoms.

苯环是一个由六个碳原子,和六个氢原子组成的环。

麻省理工公开课 - 化学原理课程节选