necessary evil

例句：

1. 1.The government's decision to cut funding for education was a necessary evil in the face of rising tuition fees.
   面对学费上涨，政府决定削减教育资金是不得已而为之。
2. 2. Despite the dangers, we must confront the necessary evil of war if we are to achieve peace.
   尽管有危险，但如果我们想要实现和平，就必须面对战争这一不可避免的恶行。
3. 3.The company had to make some difficult decisions, including cutting back on research and development expenses, which was a necessary evil for survival.
   公司不得不做出一些艰难的决定，包括减少研发开支，这是为了生存所必须做的恶行。