instantn.瞬间；立即adj.立即的；即时的；速成的instant picture一次成像照片instant monitor实时监控instant-start瞬时接入,瞬时起燃instant payment立即付款instant speedup瞬时加速比instant painting速写instant response即时响应instant exercise一过性运动instant shipment立即装运instant feedback即刻反馈