We had prepared the Polyjuice Potion beforehand.

我们事先配好复方汤剂。

Do we need an appointment beforehand?

那我们预约吗？

Residents have been warned to get out beforehand.

已警告居民撤离。

Let me buy the tickets beforehand.

我来订票。

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两个星期赶到。

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.

在之的数小时，现场充满了争执，有时还很激烈。

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

我认为最重的是拉伸和放松。

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

5年正是这个时间，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两种。

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

她是有些疯狂。她之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，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.

你为什么不给他做个三明治呢。