一旦决定了，事情很快顺理成章。

Once the decision was made, things fell into place rapidly.

《柯林斯英汉双解大词典》

她一旦决定干什么，谁也改变不了她的主意。

If she once decides to do something, you won't change her mind.

《牛津词典》

不过一旦决定了的事，不会轻易改变！

But once they make a decision they are unlikely to change it.

youdao

But once you start publishing things in between covers, you actually have to decide what goes in and what goes out.

但一旦你开始把书籍加上封面出版，你就必须决定要出版哪些书。

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Once you can see it and once you can step back from it, then you can also decide, "This pass is my filter. This pass is my constraint.

一旦你看到了它，一旦你能退一步思考它，你就能决定，这么走可以去伪存真，这么走会遇到困难。

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But if you are going to make them permanent ? where are you gonna cut spending?

然而，一旦决定长期减税,又如何才能削减财政支出呢？

斯坦福公开课 - 经济学课程节选