A: Have your prepared well for the exam?
你已经为考试做好准备了吗？
B: I will fight tooth and nail.
我将全力拼搏。
1. 解释
Fight tooth and nail其实就是fight with teeth and nails的简约写法。Tooth是“牙齿”，nail是“指甲”。在打架的时候，又咬又抓，那可真是一场使出浑身解数的恶斗。所以，fight tooth and nail的意思就是“全力拼搏”。
2. 例句
e.g. There is another election coming on next fall, and he knows we are going to fight tooth and nail.
来秋另一次大选就要来到了，他知道我们要全力以赴的。
e.g. When Susan took her case against the company to court, people in the office were afraid to testify on her behalf. But she went ahead anyhow, fought tooth and nail, and she won.
当Susan上法庭控告这家公司的时候，办公室的人都不敢为她作证，然而她仍然挺身而出，全力拼搏，并取得了胜利。
