frown

他带着困惑的皱眉看着我。

He looked at me with a puzzled ___frown.

当她听到这个消息时，一丝皱眉掠过她的脸。

A slight ___frown crossed her face when she heard the news.

她持续的皱眉表明她承受着相当大的压力。

Her constant ___frown suggests she is under considerable stress.