We were discussing the necessity of employing more staff.
我們在討論是否需要雇用更多員工。
Air-conditioning is an absolute necessity in this climate.
這樣的氣候絕對需要有空調(diào)。
Most women, like men, work from economic necessity
與男人一樣，大部分女人也是出于經(jīng)濟原因而工作。
Water is a basic necessity of life.
生命離不開水。
The population failed to understand the necessity for the war to go on.
人們不能理解那場戰(zhàn)爭再繼續(xù)下去有什么必要。