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At the close of our studies, we knew all the past of physics, but nothing of the present and the future.
形容时光飞逝,人生易老,鸡鸣和马蹄声象征着时间的流逝
有了实际工作的经验,幼儿的自我就会逐渐发展强化。
Liberal democracy may constitute the "end point of mankind's ideological evolution" and the "final form of human government," and as such constituted the "end of history."
Sustainability isn't an option anymore - it's our responsibility to future generations.
Language is the only homeland we truly possess.