Before starting, go through this checklist to make sure you have the following.

在开始之前，对照下面的检查单进行检查，确保具备了这些条件。

youdao

Before starting, go through this checklist to make sure you have the following.

在开始之前，对照下面的检查单进行检查，确保具备了这些条件。

youdao