major cause of failure

例句：

1. 1. The project failed to meet the deadline.
   这个项目没有在截止日期前完成。
2. 2.His sudden departure was a complete failure of his plan.
   他的突然离开完全违背了他的计划。
3. 3.The company's financial report showed a significant failure in its operations.
   公司的财务报告显示其运营出现了重大失败。