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.

Errors, like straws, upon the surface flow; he who would search for pearls must dive below.

测量的精确性不仅仅是技术问题，更是拓展人类知识边界的关键。

经济发展中最重要的事情不是正确地做事，而是做正确的事情。

The work of art is a bridge between worlds.