Trade between two countries can be mutually beneficial, even if one of them is less efficient in the production of all commodities.
The secret of great fortunes without apparent cause is a crime forgotten, for it was properly done.
When the third appeared, he thrust at it with the knife, only to feel the blade[刀片] snap as the fish rolled.
The biggest room in the world is the room for improvement.
每个算法都讲述了一个故事，一个从问题到解决方案的步骤叙述。