这是一个完整的压缩包，所以你无须安装先前较早的版本。

This is a full package, so you do not need to install previous versions first.

youdao

无须到场安装电话线。

No need to install telephone lines to the scene.

youdao

无须到场安装电话线。

No need to install telephone lines to the scene.

youdao