You must first if all acquaint yourselves with the market.

你必须首先要？解市场情况。

youdao

You must first of all acquaint yourselves with the market.

首先，你们必须要了解市场情况。

youdao

You must first of all acquaint yourselves with the market.

首先，你们必须要了解市场情况。

youdao