Next time an all-nighter leaves you with a headache, remember that the same principle also applies to medicines. Branded pain killers can be significantly more expensive than supermarket versions, which often sell for less than 1.
下次宿醉之后再头痛,记得买药也是一样的道理。知名品牌的止痛药会比超市卖的普通品牌贵很多。超市的品牌一般只卖不到一英镑。
n. 原则,原理,主义,信念