我们很快发现：新程序的发布现在才正式开始。

We'll find out soon enough: the launch event starts now,.

youdao

感谢您的发言！我相信诸位会度过一个美好的夜晚，随意享受快乐…现在我宣布我们晚会正式开始。

Thanks for your speak!. We are sure we'll have a very good time this evening. Just enjoy yourself... now I announce that our party is begin.

youdao

现在我们的音乐秀正式开始，我们先为大家播放一段4分钟长的幻灯片，一起来回顾一下汶川大地震发生后那些令我们感动，悲伤而又激奋的画面和场景。

Now, it's show time. We are going to play a 4-minute PowerPoint show. Let us review and memorize those touching and encouraging scenes and moments during after-quake rescue.

youdao

I'm going to start going into the physics proper.

现在我们开始正式走进物理世界

耶鲁公开课 - 基础物理课程节选