The task of the theory consists in replacing the phenomena to be explained by something simpler, which contains the essence of what is happening.
理论的任务在于用更简单的东西替代待解释的现象，其中包含所发生事件的本质。
Blackness is not a monolith; it's a multiplicity.
Small-scale fisheries are just as vital as large operations for a balanced ecosystem.
投资就是低买高卖，相当简单。问题是要知道什么是低，什么是高。