一个人有身份有地位的时候朋友很多,但危难时候却没人与之交待。
The future of medicine will be shaped by our understanding of genetics.
The future of computing lies in the development of systems that can verify their own correctness.
A person who makes no mistakes usually doesn’t make anything.
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。