Quadriceps Femoryafteries 基本例句 股四头肌 To strengthen weak knees, the quadriceps group of muscles need to be strengthened.只有股四头肌被加强的时候虚弱的膝关节才能得到加强。 It is a very good exercise machine for keeping your quadriceps strong after surgery.它是一部在术后保持股四头肌强壮的非常好的练习机器。