学习数学的最好方法就是去做数学。

化学是物质的科学，但我更愿意将其视为变化的科学。

译文：金子遇火烧炼才能识别出成色如何，人与钱财打交道就能看出心地如何。赏析：金钱虽非万能，却能看清人心。钱，是感情的试金石，它能探出人性，看透人心。钱能看清一个人的真实面目，也最能看清自己在别人心中的分量。

For us who understand life, figures are a matter ofindifference.

To do things with words is not a special kind of doing， but a special kind of speaking.

The uniformity of the hybrids in the first generation, the dissimilarity in the second, are facts which cannot escape the attention of an accurate observer.