1. Increased traffic necessitated widening the road. 交通量增大，这就需要拓宽道路。
2. A prolonged drought had necessitated the introduction of water rationing. 一场持续的干旱使定量供水的引进成为必需。
3. Recent financial scandals have necessitated changes in parliamentary procedures. 最近的金融丑闻使得议会程序必须改革。
4. Many necessitated payments to songwriters and the music publishers, like Chrysalis, that represent them. 有很多音乐都需要向作曲者及代表他们的音乐发行商，比如向 Chrysalis 付费。
5. In 1866, the construction of the North Wing of the Treasury Building necessitated the demolition of the State Department building. 1866年，由于财政部北翼的建设工程，亟需对国务院大楼进行拆除。
