解释：齐国是强国，利用它的强大进攻宋国，让他逞强，燕国就可以乘机打败齐国；齐国是大国，利用它的大国野心吞并宋国，增加土地，燕国就可以乘机进攻。

In truth， there was only one Christian and he died on the cross.

技术是工具，人性才是核心。

The past is a cupboard full of light and all you have to do is find the key that opens the door.

When you change the way you look at things, the things you look at change.

翻译：探索深奥的道理，揭示隐微的事理，钩取深处的义理，使人获得深远的教益。