You can sideload apps but that's a bit geeky for most users and only a few apps are legally available to sideload.

当然你也可以从其它设备上拷贝应用，不过对大多数用户来说，这个太复杂了，而且只有少量应用是可以合法拷贝的。

youdao

Another reason why the time is right for Nokia: among the people who do put music on their phone, most of them "sideload" it by transferring tunes over from a PC.

另外一个诺基亚把握了好时机的原因在于：在那些使用手机播放音乐的人群中，更多的人使用接驳电脑的方式来接收音乐。

youdao

Most users won't know or care to sideload apps, so BlackBerry has to work hard to make sure those users don't have to in order to get the best possible experience.

ENGADGET: Back to BlackBerry: closing time Mobile

The man paid in cold hard cash, and after a tedious 40 minute purchase process that involved a bit of activation, some nice tutorials, a quick address book sideload from his old Touch Diamond and whole lot of peripheral upsell, Alfredo was one of the world's first satisfied Pre customers.

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