I'm going to fight tooth and nail to get them to change their mind.

我要" fight tooth and nail" ，让他们改变主意。

To fight tooth and nail means to make a strong effort to try to stop something or achieve something.

" To fight tooth and nail" 指的是竭尽全力去阻止某事或实现某事。

We're going to fight tooth and nail to stop them building a new motorway going right past our house.

我们要竭尽全力阻止他们把新的高速公路修的穿过我们的住所。

My football team needs to fight tooth and nail to stay in the top division. They have to win today's match!

我的足球队要全力以赴留在顶级联赛，他们必须要赢得今天的比赛！

He’s rich now, but he had to fight tooth and nail for it.

【fight】他现在是富了，但他是奋斗出来的。

I knew my own mind well enough and always had my own way, even if I had to fight tooth and nail for it.

我十分清楚自己的念头，但总是一意孤行，我甚至会用牙齿和指甲相胁，以此来满足自己的要求。

So, like the sharks that inhabit them, humans need to fight tooth and nail to protect these essential ecosystems.

因此，就像栖息在其中的鲨鱼一样，人类需要竭尽全力保护这些重要的生态系统。

The Allied powers had to fight tooth and nail for  every island in the Pacific theatre of the war.

盟军不得不为太平洋战区的每一个岛屿奋战到底。