essence和essential做名词时的区分

essence 本质; 精髓; 要素:that which makes a thing what it is; most important or indispensable quality of
sth
The essence of his argument is that capitalism
cannot succeed.他的论点的核心是资本主义不能成功.
essential n 通常作复数) fundamentally necessary element or thing 要素; 要点
A knowledge of French is an absolute essential.
会些法语是非常必要的.
是的,essence多用于表达精华