喜欢热闹的人,常常是因为灵魂寂寞;喜欢孤独的人,往往是因为思想充盈//@吴世勋的吴夫人: increase, the object's weight increases. The weight of an object on the moon is about one-sixth of its weight on Earth~!明明说的都是physics,但是确实chemistry的textbook