Why the sun lightens our hair, but darkens our skin?

为什么太阳能把头发晒浅，却能把皮肤晒黑？

Why is "abbreviated" such a long word?

为什么“缩写”是这么长的一个单词？

Why is it that doctors call what they do "practice"?

为什么医生们管他们所做的事情叫做“实习, 实践”？

Why is it that to stop Windows XP, you have to click on "Start"?

为什么在要关掉视窗时，你必须先点击“开始”键？

Why is the man who invests all your money called a broker?

为什么帮你管理你的所有投资的人叫做“不名一文的人”？（“broke”在英文中有“不名一文”，“穷到家了”的意思）

Why is the time of day with the slowest traffic called rush hour?

为什么一天中交通最慢的时刻叫“速行”时刻？

Why isn't there mouse-flavored cat food?

为什么没有老鼠味儿的猫食？

When dog food is new and improved tasting, who tests it?

当狗食被宣扬是新的和改进了的口味的时候，是谁作的口味鉴定？

Why didn't Noah swat those two mosquitoes?

为什么诺亚没有把那两支蚊子打死？（诺亚方舟上带有每种动物的雌雄各一只）

Why do they sterilize the needle for lethal injections?

在用注射毒剂的方式执行死刑时，为什么还要消毒针头？

You know that indestructible black box that is used on airplanes? Why don't they make the whole plane out of that stuff?

你知道那个用在飞机上的“不会被摧毁”的黑匣子吧？为什么他们不把整架飞机都造成那种材料的？

Why don't sheep shrink when it rains?

为什么下雨时绵羊不缩水？

Why are they called apartments when they are all stuck together?

为什么公寓都紧紧靠在一起？（apart是分开的意思）

If con is the opposite of pro, is Congress the opposite of progress?

如果“坏处”是“好处”的对立面，那么“众议院”是不是“进展”的对立面？