她在会议中沮丧地握紧了拳头。

She clenched her ___fist in frustration during the meeting.

抗议者们举起拳头以示反抗。

The protesters raised their ___fist in a sign of defiance.

他用拳头击打墙壁，在石膏上留下了一个凹痕。

He struck the wall with his ___fist, leaving a dent in the plaster.