贫贱之交不可忘，糟糠之妻不下堂。
译文：贫困时的朋友不能遗忘，共患难的妻子不能抛弃。体现对情义与责任的坚守。
自然界的普遍法则大多不是直接感知的对象。
We don't inherit the earth from our ancestors; we borrow it from our children.
In mathematics, truth is found not through consensus but through proof.
"There is a world of difference between the love we feel for a wild creature and the love we feel for a human being."
We can’t just keep doing things the way we’ve always done them. The world has changed, and so must we.
译文：人生的处境变化无常，我们一定要谋划未来，学习安身立命的本领；人生的光阴容易逝去，我们应该尽早谋划人生，确立目标并付诸行动。赏析：生命有限，时光短暂，我们应早日树立人生目标，学得一技之长，方能立于不败之地。