1.derail v. (使)脫軌;阻撓
例句:Several people were injured today when a train was derailed.
今天有數(shù)人在一列火車出軌時(shí)受了傷 。
2.on the edge 邊界狀態(tài):處于不穩(wěn)定的狀態(tài)
例句:The standard of living today is on the edge of subsistence.
現(xiàn)在的生活水平幾乎快要無法維持生計(jì) 。