来尝试一种别样的通讯体验吧。Signal 不仅提供各种常见的功能，还尤为注重隐私安全。 Call back links: In place of having to produce a Signal group chat before beginning a bunch get in touch with, it is possible to produce a backlink to let any person on Signal immediately sign up for a call. No group chat desired! On four Oct 2016, https://www-signal.com/