短语词组用作名词 (n.)动词+～aim 〔point〕 a rifle 瞄准目标assemble 〔dis〕 a rifle 组装〔拆卸〕步枪fire a rifle 开枪operate a rifle 操作步枪形容词+～automatic rifle 自动步枪hunting rifle 猎枪名词+～air rifle 气枪～+后置定语rifle carrying far 射程远的步枪介词+～range of rifle 步枪的射程soldier with rifle 背着步枪的士兵短语 返回 rifled