译文：天地永恒无穷尽，生命短暂很有限，过一天就少一天。荣华富贵自古以来就有定数，但学问则无定数，只要花费一份力，就会收获一分知识。赏析：这句话告诉我们，生命和青春有限，要懂得珍惜生命和时间，不要挥霍无度。我们要在有限的生命里，多读书学习，那么就会有收获。

CRISPR is a tool—how we use it defines its legacy.

预测未来的最好方法就是创造未来。

Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.