As well as firearms, police confiscated knuckle-dusters and other weaponry.除了枪械，警察还没收了些指节金属套和其他器械。She rapped her knuckles on the table.她用指节轻叩桌子。The boy scraped the skin off his knuckles.这男孩擦去了指节上的皮。Her knuckles whiten as she clenches her hands harder.她的手握得越来越紧，指节都变白了。