After the last extension has been downloaded, the installation begins. First all installed extensions for which an update could be downloaded successfully, are removed. Then the updated extensions are installed. If an error occurs, a message that the installation failed is displayed, but the operation proceeds.
下载完最后一个扩展之后，将开始安装操作。首先删除可以成功下载更新的所有已安装的扩展。然后安装更新的扩展。如果发生错误，将显示安装失败的消息，但操作将继续进行。