It is India that gave us the ingenious method of expressing all numbers by means of ten symbols, each symbol receiving a value of position as well as an absolute value.

拿一个物体。对它做点什么。再对它做点别的。

人依靠自己的力量人才能生存，不依靠自己的力量人就不能生存。 

化学工业是现代文明的支柱，我们必须以应有的尊重和责任对待它。

The future isn't written in the stars. There are no guarantees. So claim your adulthood. Be intentional.

大自然不在乎你的计划。它会考验你，你必须做好准备。