We had prepared the Polyjuice Potion beforehand.

我们事先配好复方汤剂。

Do we need an appointment beforehand?

那我们要提前预约吗？

Residents have been warned to get out beforehand.

已提前警告居民撤离。

Let me buy the tickets beforehand.

我来提前订票。

She ought to have reported it to the boss beforehand.

她本应该事先向老板报告的。

People with cheaper tickets have to arrive two weeks beforehand.

买便宜球票的人只好提前期赶到。

Uh, in the future, if I could see the schedule beforehand...

下一次的时间表，可不可以先我看看？

In the hours beforehand, the mood was fractious and occasionally heated.

在之前的数小时，现场充满了，有时还很激烈。

I think staying on top of, you know, stretching out and loosening up beforehand.

我认为最重要的是提前拉伸和放松。

That was the exact time that a magnitude 9.0 earthquake struck five years beforehand.

5年前正是这时间，日本发生了震级9.0的地震。

Most snakes, however, will use one of two strategies to kill their prey beforehand.

然而，大部分的蛇杀死猎物的方法有以下种。

She is a little bit insane, yeah. She had a very sad love story beforehand.

她是有些疯狂。她之前经历过一段非常悲伤的爱情。

Yes, and I imagine he'd like us to have the math worked out beforehand.

没错，我猜他一定希望我们能在送他上去之前落实相关计算。

Because I want to travel the world and go to university and see other cultures beforehand.

因为在这之前我还想环游世界，上大学，体验其他的文化。

So I took the hour beforehand to look him up, look at some of his videos.

所以我提前一小时去搜索他，看了他的一些视频。

And they discovered that a lot was happening with Earth's magnetic field thousands of years beforehand.

他们发现，在之前的数千年里，地球磁场发生了很多变化。

Many owners argued they would have chosen to replace batteries if they had known the issues beforehand.

很多用户认为，如果事先知道这一问题，他们可能会选择更换电池。

Leaders of the Intelligence Committee complained that Cohen violated an agreement by releasing a public statement beforehand.

情报委员会领导人称科恩违法协议规定，提前向公众发表声明。

First, he inhaled pure oxygen for 30 minutes beforehand.

首先，他事先吸入了 30 分钟纯氧。

Why don't you make him a sandwich beforehand.

你为什么不提前给他做三明治呢。