The past is always tense, the future perfect.
每一个数学问题都是一个等待解决的谜题,每一个解决方案都是迈向更深入理解的一步。
The strength of a nation lies in the unity of its people.
Everyone has the brainpower to follow the stock market. If you made it through fifth-grade math, you can do it.
天(自然规律)不会改变,道(根本法则)也不会改变