Only continuous learning can keep us invincible in fierce competition.
Sustainability isn't an option; it's our responsibility to the next generation.
世界是一本书，不旅行的人只读了一页。
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。
Love is the only reality, and it is not a mere sentiment. It is the ultimate truth.