"The present is a fleeting moment, but the past is eternal."
In Russia, severity of laws is compensated for by their non-enforcement.
光的理论实际上是物理学两大理论的交汇点,即粒子理论和波动理论。
Stay true to yourself, yet always be open to learn.
解析:知道自己还有所不知,这是很高明的。不知道却自以为知道,这就是很糟糕的。
The scientific study of behavior must be based on objective, measurable data.