请下载试用和测试，然后再买到。

Please download the trial and test it before you buy.

youdao

视频均来自网络，只做电脑测试用，请下载后24小时内删除！

Video is from the network and only the computer test, please delete download within 24 hours!

youdao

视频均来自网络，只做电脑测试用，请下载后24小时内删除！

Video is from the network and only the computer test, please delete download within 24 hours!

youdao