点击下载：《大学英语》课程教学资源（PPT课件讲稿）College English Book 2 Unit 7 There is Only Luck
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Guns Components Scope Rear sight Front sight stock Barrel Bolt Butt plate Trigger Trigger guard slingGun’s Components
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点击下载：《大学英语》课程教学资源（PPT课件讲稿）College English Book 2 Unit 7 There is Only Luck
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