青年的危机不是生物性的，而是社会和政治性的，它需要一种新的语言来理解他们斗争性质的变化。
The community is a fictitious body， composed of the individual persons who are considered as constituting as it were its members.
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.