当随机化不可行时,匹配方法可以是一个强大的工具。
煤炭行业的高质量发展必须坚持安全第一。
Life is about making an impact, not making an income.
The moment you give up is the moment you lose.
One of my primary objects is to form the tools so the tools themselves shall fashion the work and give to every part its just proportion.