1.必定,务必
1.used for emphasizing that something always happens in the same way or at the same time
2.used for emphasizing that someone must do something
1.He said he would go fishing without fail.
他说他一定会去钓鱼的。
2.The dog continued to wait for its master at the train station without fail until its own death two years later.
那条狗忠心耿耿天继绝正在水车站期待家丁，直到两年后死往。
3.In his speech, Mr. Lee defended the military and said North Korea would pay 'a dear price without fail' if it attacks again.
李明博在发言中为韩国军方辩护。他说，若朝鲜再次发动袭击，则“势必要付出惨痛代价”。
4.He wants you to see him in London without fail.
他要你务必在伦敦见他。
5." Without fail, however, they fell asleep as if knocked unconscious every time I sang " Over the Rainbow.
但屡试不爽的是，每当我唱起《飞越彩虹》，她们就像被敲昏似的睡了过去。
6.Therefore, may you all try to understand this point without fail.
因此，希望你们对这一点都能理解无误。
7.Please look the matter up at once and see to it that the goods are delivered without fail.
请立即核查此事，务必确保货物一定发运。
8.without at least one condition that can be met without fail , your procedure runs a high risk of executing in an infinite loop.
如果没有一个在正常情况下可以满足的条件，则过程将陷入执行无限循环的高度危险之中。
9.Lately, when a patient comes in complaining of these symptoms, I walk over and pick up her purse, she added. Without fail, it weighs a ton.
最近，每当患者抱怨有上述症状，我就走过去，拿起她的包包，结果十之八九都有一吨重。
10.And each time, without fail, Detroit manages not to see this coming.
可每一次美国汽车业的管理层都未能看到这一趋势，而且总是没有例外。