如果你想谈论决定做某事，你可以用不同的动词或者动词短语，例如make your mind up/下决心；decide/决定。

If you want to talk about deciding something, you can use various verbs or verb phrases, e.g.

当你决定做某事时，要坚持到底。

When you decide to do something, stick to it.

如果他决定做某事，任何人也无法阻止他去做。

If he is determined to do something, nobody can stop him from doing so.

既然她已经决定做某事，就没有什么能阻止她坚持到底。

Since she has made up her mind to do something, nothing can prevent her from following through.

一旦领导决定做某事，团队成员就应该全力支持这一决定，投身于指派的工作之中。

Once the leader makes the decision to do something, the team-members should fully back up this decision by devoting themselves to fulfilling the task assigned.

在决定停止做某事的时候，年龄似乎是一个模糊的标准。

Age seems a blunt criterion to decide when to stop.

决定未某人做某事。

Determine to do something for sb.