凡是现实(存在)的就是合理的，凡是合理(存在)的就是现实的。
Where reality (existence) is reasonable， all reasonable (presence) is realistic.
地球也是球形的，因为它从各个方向向中心施加压力。
我们地球的过去历史必须通过现在可以看到的现象来解释。
Just as in a good novel， a good program must be full of interesting ideas， and very， very few words.
Food security is a global issue that requires local action.
未来属于敢于梦想的人。
I like to buy stocks when they are on sale.