You think you know when you can learn, are more sure when you can write, even more when you can teach, but certain when you can program.

采矿业必须带头展示采掘作业如何与环境管理共存。

Reason obeys itself; and ignorance submits to whatever is dictated to it.

I am not the most perfect person, but I am the most real person.

【译文】冰与炭不能长久共存，寒与暑不会同时到来。