n.要件；概要
"The room was furnished with the simplest essentials, a bed, a chair, and a table." ＂房间里只布置了最简单的必需品，一张床、一把椅子和一张桌子。＂
In considering this problem, you should grasp its essentials. 在考虑这一问题时，你应当抓住实质。
非必需品
