但是用户却不得不首先下载和安装Flash插件来实现这些特性，而且还需要下载更新的版本来确保Flash能够得到及时的升级。

But users have to download and install Flash to make these features work, and they need to download newer versions to keep it up-to-date.

youdao

但是用户却不得不首先下载和安装Flash插件来实现这些特性，而且还需要下载更新的版本来确保Flash能够得到及时的升级。

But users have to download and install Flash to make these features work, and they need to download newer versions to keep it up-to-date.

youdao