be no exertion to

例句：

1. 1.We don't need to put in any effort to achieve our goals.
   我们不需要付出任何努力来实现我们的目标。
2. 2.There's no need for us to go through the trouble of doing this ourselves.
   我们没有必要亲自去做这件事。
3. 3. It's not necessary for you to learn all the details about the project.
   你没有必要了解这个项目的所有细节。