"Never in the 17 years of climate change negotiations have so many different nations made so many firm pledges together,".

VOA: standard.2009.12.06

So biomedical engineers have been working for many years on how to design replacement parts for joints like the hip: the artificial hip is the most well developed of those.

因此,生物医学工程师花了很多年时间,致力于设计像髋关节这样的关节替代品,尤以人工髋关节的研究最为成熟

耶鲁公开课 - 生物医学工程探索课程节选

Ah, many of you have seen it, it's a great film. It's a true story, it's about Fountainebleu, which is southeast of Paris, sort of a fancy place, and it's about his childhood about French schools. My kids have been in French schools for many years so I know about these places.

人不少啊,是部好电影,是真实的故事改编的,关于枫丹白露,在巴黎东南,一个豪华的地方,关于他童年的,你会学到关于法国学校的事,我孩子在法国,学校念了好多年所以我知道

耶鲁公开课 - 1871年后的法国课程节选

You pay every year a fixed amount on your house to the mortgage originator and then after so many-- n is 30 years, typically--you would then have paid it off.

你每年都在你的房子上支付一定数目的偿款,给抵押商然后,数年后,设n是30年,一般来说你已经能偿清贷款了

耶鲁公开课 - 金融市场课程节选