necessity

n. /nəˈses.ə.t̬i/ B2

必要性；必需品

The state of being required or indispensable; an essential thing.

仙境例句

“There is no necessity to burn the house down!” Alice called from the window.

“根本没必要把房子烧掉！”爱丽丝在窗口喊道。