necessitate
v[Tn, Tg, Tsg]
(fml 文) make (sth) necessary 使(某事物)成为必要
It's an unpopular measure, but the situation necessitates it. 这是不得人心的办法, 但形势需要这样做.
Your proposal will necessitate borrowing more money. 依你的建议, 就必须增加借款.
Heavy iron chains around his feet and hands were fixed to a metal bar that ran round the hall about ten centimetres off the ground.
手上和脚上沉重的铁链拴在厅堂四周离地约有10厘米的金属杆上。
Professor Karl von Frisch, an Austrian scientist, spent many years of his life researching the amazing ways honey bees communicate in their dark hives.