One hundred fifty plus office hours is the current tally that you'll see starting to appear on the course's website, thanks to our 60 plus person staff and you'll also see online soon once you have your accounts as per problem set 0 spec.

50多个小时的课时,就是你现在在课程网站上要看到的，在这里我们要感谢60多位同仁的帮助,一旦你开通账号，你就可以在线看到了。

哈佛公开课 - 计算机科学课程节选

If some group, let's say you have cholesterol of two hundred and your relative risk is established at one, and then if you have cholesterol two fifty your relative risk is two, that means you have twice the risk, so relative risk of two is twice the risk, three is three times the risk, etc.

比如说有一个组,胆固醇水平200,相对风险设为1,另一个组胆固醇水平是250,相对风险是2,即第二组的相对风险是参照组的两倍,相对风险是2代表两倍风险,3代表三倍风险,如此类推

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选