Emancipate yourselves from mental slavery, none but ourselves can free our minds.
The poem is a way of holding on to what otherwise would be lost.
教学不是注满一桶水,而是点燃一把火
通往可持续能源未来的道路需要一种平衡的方法,考虑经济、环境和社会因素。
The notion of truth is not definable in any formal system that is strong enough to include arithmetic.