数学研究是具体与抽象之间不断的对话。

You must be the change you wish to see in the world.

儿童是通过努力从事活动，从而使个人得到发展的。

She walks in beauty like the night,Of cloudless climes and starry skies;All that's best of dark and bright，Meet in her aspect and her eyes.

经济周期并不像曾经认为的那样仅仅是围绕稳定趋势的波动，而是反映了经济中更深层次的结构性变化。

The human body is a masterpiece of biological engineering.

You can't be afraid to fail. It's the only way you succeed.

Leadership is like pruning: sometimes you must cut back to allow stronger growth.

The spirit of science is the spirit of seeking truth and being pragmatic.

她们开心地为别人活着，没人留意她们所做出的牺牲。最后，炉上的小蟋蟀停止了甜美的歌唱，灿烂的阳光消逝，只留下了寂静和阴影。