The opportunity does not go hand in hand, so when they come, you’d better hold them.
What a caterpillar calls the end of the worldwe call a butterfly.
腐朽的木头无法雕刻。
教育的目的不是使年轻人在任何一门科学上都变得完美,而是要打开和培养他们的思维,使他们在将来学习任何科学时都能胜任。