是印度给了我们表达所有数字的巧妙方法，每个符号都有一个位置值和一个绝对值。
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.
解释：神态傲慢，谁还愿意和你相处呢？最洁白的东西好像十分黑暗，最道德的人好像有所不足。
无法达成的目标才是我的目标，迂回曲折的路才是我想走的路。
The most sustainable plastic is the one that never needs to be made in the first place.