在拍摄新照片前，我都要先做一些调查与思考，使自己能投入到拍摄的意境中。

Before I start a new project, I need time for research, thinking and for letting myself go.

youdao

在开始正文前，先做个申明，参赛的第一目标不是奖品，而是为了与大家分享。

Before starting the body, allow me to declare: the main goal for taking part in the competition is not for the awards, just want to share with all of you.

youdao

我认为，拒绝我方报盘前，您最好先慎重权衡有利条件。

I think you'd better weigh the advantages carefully before rejecting our offer.

youdao

Well, let's just give a teaser of some of the details before we move on to actual interesting functionality.

在转去介绍,其他更实际有趣的知识前,我先让大家注意一个小细节。

哈佛公开课 - 计算机科学课程节选

I mean there are definitely other ways around that and by justifying, no, hang on, hang on, before you laugh at me.

我是说，一定有其他变通的办法,通过判定。。。，不对不对，等等，趁没嘲笑我前我先改正。

耶鲁公开课 - 公正课程节选

Maybe somebody who knows Citizen Kane and would like to have a grade for the first 50 pages.

也许比较清楚了解的同学可以做,需要先读前50页的内容。

麻省理工公开课 - 电影哲学课程节选