This makes it a great choice of exercise for people with special needs, like pregnant women,older adults, and persons who are overweight.

VOA: special.2010.06.08

Construction is a combination of workmanship and choice of materials. Take this computer, if I pull the silicon out, I replace it with gallium arsenide, leave everything else the same.

构造则是技巧和材料的选择,的结合，拿这个电脑为例，如果我将硅取出，替换成砷化镓，其他东西不变。

麻省理工公开课 - 固态化学导论课程节选

Perhaps a mistake with some of the answers we got but one of our choice favorites was this one and it's actually fairly worth drawing one's attention to and that's this: I planned on taking the class as a freshman then convinced myself otherwise because I couldn't fit it into my workload.

得到的回答或许有的是错的,我们最喜欢的一个回答是这样的,值得我们注意一下：,我本打算大一就来上这节课,但却说服自己还是别去上了,因为我工作负荷满满的。

哈佛公开课 - 计算机科学课程节选