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關注：1
2013-05-23 12:21
求翻譯：The most significant developments in both ammunition and weapons followed the refinement of gunpowder in the thirteenth century ,which enabled it to be used in time as a propellant explosive to propel missiles and other projectiles over long distances.是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
The most significant developments in both ammunition and weapons followed the refinement of gunpowder in the thirteenth century ,which enabled it to be used in time as a propellant explosive to propel missiles and other projectiles over long distances.
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