俗话说：“一分耕耘，一分收获”。人们都知道耕耘对于收获是何等得重要──没有耕耘就没有收获。然而，事实上并非所有的耕耘都肯定有收获。从逻辑上讲，耕耘只是收获的必要条件，而非充分条件。也就是说，有了耕耘未必一定都有收获。只要我们认真观察一下，就可以发现世界上 As the saying goes: “a hard job, a gain.” People all know how hard work is for harvest - there is no gain without hard work. However, in fact, not all hard work must have been harvested. Logically speaking, cultivation is but a necessary condition for harvest, not a sufficient condition. In other words, with hard work will not necessarily have harvested. As long as we take a closer look, we can discover the world