This is the story of how one man combined LEDs with solar energy technology to bring high-quality, low-cost electric light to poor people around the world.

VOA: standard.2009.12.13

And then when we got to more of a cellular level, that we could actually understand how our body worked as low of a level as thinking about cells.

肺怎么工作，我们到了细胞的层面上研究问题,从细胞的角度理解给我们身体,怎么工作就更加有趣了。

麻省理工公开课 - 化学原理课程节选

Cause when you can actually manipulate a computer's memory at this low level, you can steal people's passwords, you can steal their data if you know how that memory is laid out.

因为即使是在这么低的权限下,你也能熟练控制电脑的存储器,你就可以窃取别人的秘密，如果知道相应数据位于哪里的话,你也能窃取别人的数据。

哈佛公开课 - 计算机科学课程节选

Alright, how many of you would say a low fat diet is best?

好了,多少人支持低脂饮食

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Blood sugar goes up more then it does with foods that are low glycemic index foods, and this affects how hungry people are and potentially their health as well.

这个血糖峰值会远远高于那些,血糖指数低的食物所形成的峰值,这个会影响人的饥饿程度,并会不经意地影响人的健康

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

How many a low carb diet?

多少人支持低碳水化合物饮食

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

How many low calorie diet?

多少人支持低卡路里饮食

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

First of all, most people believe that their cholesterol level in their body is determined by how much cholesterol they actually consume, so foods high in cholesterol would be bad in that sense and foods low in cholesterol would be good.

首先,大多数人以为体内的胆固醇含量,取决于胆固醇的实际摄入量,由此看来高胆固醇的食物确实对身体无益,而低胆固醇食物则是有益的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选