她耐心地把打结的毛衣线拆开。

She patiently ___unravels the knotted sweater thread.

科学家终于解开了这个古代密码的谜团。

The scientist finally ___unravels the mystery of this ancient code.

当她听到这个坏消息时，她的情绪立刻崩溃了。

Her composure ___unravels instantly when she hears the bad news.