升级之前卸载旧版本。

Uninstall the previous version before upgrading.

youdao

安装本版本之前请先卸载旧版本！

Please uninstall old version BEFORE installing this one!

youdao

请卸载之前安装较新版本旧版本。

PLEASE UNINSTALL you old version before installing a newer release.

youdao

请卸载之前安装较新版本旧版本。

PLEASE UNINSTALL you old version before installing a newer release.

youdao