政治制度的衰败往往是由于无法适应变化的环境,导致僵化和最终的衰落。
The true cost of unsustainable fishing is far greater than what we see on the surface.
To study history is to learn the grammar of time.
动力学的方程在用变分法的语言表达时是完全的。
Olympism... exalting and combining in a balanced whole the qualities of body, mind and will.
The poem is an inner image that emerges into words.