首先讨论如何优化已知扩展的输出。

First, look at how to optimize the output for a known extension.

youdao

我们先讨论国家问题，然后讨论语言问题。

Let's look at country issues before tackling language problems.

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我们先讨论零阶反应。

So let's talk about zero order reactions.

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So, we'll start today talking about the two kinds of molecular orbitals, we can talk about bonding or anti-bonding orbitals.

今天我们先来,讨论两种分子轨道，我们要讨论成键和反键轨道。

麻省理工公开课 - 化学原理课程节选

All right. Let's step back from this discussion and notice how many objections have we heard to what they did?

我们先暂停讨论,回想下对他们行为，有多少反对意见？

耶鲁公开课 - 公正课程节选

Let me go back to the overall schedule before you go to the individual segment who gets in to see him.

我们先回到日程的问题上,然后再讨论你说的个人部分,谁可以见总统。

普林斯顿公开课 - 国际座谈会课程节选