我从不买任何东西，除非我能给自己一个充分的理由为什么要买它。

In chemicals, our greatest challenge is also our greatest opportunity: meeting global needs while protecting the planet.

It is a common experience that a problem difficult at night is resolved in the morning after the committee of sleep has worked on it.

若是有足够的空间，婴儿会爬行去抓取东西。

"Success is the best revenge."

理解数学就是理解现实的构造。

译文：惹下大祸是因为嘴巴乱说话，招致罪过是因为做事太狠心了。赏析：舌为利害本，口是祸福门。说话不慎就会惹下大祸。做事刻薄寡恩，冷酷无情，没有一点人情味，就会招来别人的怨恨和报复。