to cause something to be needed, or to make something necessary使成为必需;使成为必要
Reduction in government spending will necessitate further cuts in public services.削减政府开支必定会使公益服务进一步减少。
[ + -ing verb ] An important meeting necessitates my being in Boston on Friday.我星期五必须到波士顿去参加一个重要的会议。