The world is full of obvious things which nobody by any chance ever observes.
世界上充满了显而易见的事情，但没有人注意到。
Trade between two countries can be mutually beneficial, even if one of them is less efficient in the production of all commodities.
Ignoring isn’t the same as ignorance, you have to work at it.
即使是一个愚蠢的人，在大多数事情上仍然可以是正确的。大多数传统的智慧都是真的。