去之前预约一下是值得的。

It's worth making an appointment before you go.

《牛津词典》

去之前先确定时间。

Find out your hours before you go.

youdao

因此去之前的一月，便开始阅读有关黄山的资料。

So the month before, I began to collect and study facts about Huangshan.

youdao

No English poet before Milton ever suggested that he had been chosen by God at birth to be a poet.

在弥尔顿之前没有英国诗人敢说,自己是被上帝选中去做诗人的。

耶鲁公开课 - 弥尔顿课程节选

I knew the storyline before I went, but when the lights went down, and then the story came out.

我去看之前就知道故事情节了，但当灯光暗下来，演出开始，

歌剧魅影 - SpeakingMax英语口语达人

We have no evidence, and I mentioned this before, that there was a particularly close relation between these two young men.

我之前提到过，我们没有证据,去证明这两个年轻人之前有着如何亲密的关系。

耶鲁公开课 - 弥尔顿课程节选