当你需要帮助的时候，你可以求助于自己的双手。
The best way to learn mathematics is to do mathematics.
Ah, make the most of what we yet may spend, Before we too into the Dust descend; Dust into Dust, and under Dust to lie, Sans Wine, sans Song, sans Singer, and—sans End!
有时候，生活中最难的事情是知道该跨过哪座桥，该烧掉哪座桥。
True leadership is about making tough decisions today that will create a better tomorrow.
技术可以帮助我们监测森林，但拯救它们的是人类的承诺。
The sun must set to rise.