出自汉·桓宽《盐铁论·复古》。岩雀并不知道天的高远，废井中的青蛙也不会知道江海的博大。这句话是形容心胸狭窄之人见识短浅。

The future of mining lies in digital transformation and intelligent development.

The two greatest enemies of the equity fund investor are expenses and emotions.

The human brain is a social brain, and it evolved to deal with social relationships.