And scientists have been working on this for years and there's been progress, but it's still a very difficult challenge.

科学家们对此已经研究很久了,并取得了进展,但仍有很大挑战

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

In, over my life? Oh my gosh! I hope a long time, but I think my knees are probably going to give up.

我的一生吗？天啊，我希望我能跑很久很久，但我想我的膝盖可能受不了。

在马拉松认识的朋友 - SpeakingMax英语口语达人

So one problem is unenforceability but that might far off ago that might have been a problem.

强制性是一个问题,但那也是在很久以前的问题

耶鲁公开课 - 博弈论课程节选

This is old data now, from 1995, but I don't think it's changed very much.

这是个很久的数据了,来自一九九五年,但我不认为这会有多大改变

耶鲁公开课 - 生物医学工程探索课程节选

It's a wonderful clarinet solo by someone named Johnny Dodds long dead of course- but it's one of the most beautiful, incredible clarinet solos you'll ever want to hear.

这是一段由强尼·多兹演奏的单簧管独奏,当然他去世很久了,但这是一段最美妙且无与伦比的,单簧管独奏,你非听不可

耶鲁公开课 - 聆听音乐课程节选

And this will have to go up before The International Union of Pure and Applied Chemistry before they approve it because they fought over element 106 for the longest time, but I think this will go through fairly quickly.

但还是要往上申请,直到国际纯粹与应用化学联合会,因为同意,他们为106号元素抗争了很久，但我想这个应该会很快通过。

麻省理工公开课 - 固态化学导论课程节选

What's important about the construction of St. Petersburg-- I don't know how many of you have ever been there; I haven't been there for a very, very long time-- this city is not like Moscow at all.

那么修建圣彼得堡到底有什么重要的意义呢,我不知道你们之中有多少人去过那儿,我并没有在那个地方逗留过很久,但这座城市和莫斯科完全不一样

耶鲁公开课 - 欧洲文明课程节选