一旦讲座开始你就得做笔记了。

Once the lecture starts, you have to make notes.

youdao

我在作讲座前经常怯场，但是我一旦开始讲话后通常马上就好了。

I often feel stage fright before I give a lecture, although I'm usually all right once I've started speaking.

youdao

我在作讲座前经常怯场，但是我一旦开始讲话后通常马上就好了。

I often feel stage fright before I give a lecture, although I'm usually all right once I've started speaking.

youdao