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。 If you've chosen to require admin acceptance right before folks can join a phone, you'll see requests to join the decision which you'll approve or drop. You can also take out individuals from calls and optionally block them through the call so they can't be part of once https://www-signal.com/