The truth is, I don't know what I would have done without mathematics.
The whole problem with the world is that fools and fanatics are always so certain of themselves， and wiser people so full of doubts.
Every piece of plastic we produce should have a plan for its entire lifecycle.
没有人值得你流泪，值得让你这么做的人不会让你哭泣。
The truth is that which can be accepted by the majority.