在英国，我一直和那些流浪汉交流，向他们推销《大问题》——事实上这并不花费巨大，也不需要花费你日常生活的很多时间，只是需要进行正常的谈话而已。

Here in London, I always chat to a homeless person selling The Big Issue - it really doesn't take much to take some time out of your routine and just have a normal conversation.

youdao

但是准确性是在一丝不苟的基础上的，一丝不苟是需要花费很多很多时间的。

But accuracy rests on the bedrock of thoroughness, which takes time.

youdao

我以前在电脑游戏上花费了很多时间以至于我在学习上失去了兴趣。

I used to spend so much time on computer games that I lost interest in study.

youdao

So this is perhaps a site that some of you have spent way too much time on last year, if not in the past week or so, com this is isawyouharvard.com.

很多同学去年的时候,在这个网站上花费了很多时间，可能上周还玩了，这个网站的网址是isawyouharvard。

哈佛公开课 - 计算机科学课程节选