A method of solution is perfect if we can foresee from the start, and even prove, that following that method we shall attain our aim.
人类与土地的联系是我们生存的基础。
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.
最具挑战性的时期往往揭示了转型的最大机遇。
Don't let the noise of others' opinions drown out your own inner voice.