A:This is really neat! 太好了 。
B:When do we eat?我们什么时候吃？
A:First, we have to catch some fish. 首先 我们得钓几条鱼。 In order to catch fish, you have to do this.
要钓鱼你就得这样。Here we go.
现在可以开始了。
A:That's it. 对了！就这样。

That's it! 的4种用法⬇️

01.

陈述语气，表示找到了问题所在，意思就是：“问题就在这儿”。

• That's it, that's why the computer is broken again.

  哦，原来问题在这啊

  
  

02.

“没有别的了”“完了”“到此结束了”。

• - Anything else?

  还要其他的嘛？
  - That's it.

  没别的了

  
  

03.

“好了”“算了”“够了”。

• Well, That's it. You still firmly hold your point of view. There's nothing I can do about you.
  好吧，算了，你还是坚持你的观点，我拿你没办法。

  
  

04.

“这就对了，就是这样”。在口语中，用来表示赞同。

• That's it. You've done a great job!
  对啦，就是这样，你做的很棒！