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關注：1
2013-05-23 12:21
求翻譯：Developments in the modern reinforced concrete design and construction practice were pioneered by European engineers in the late 9th century.是什么意思？ 待解決
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- 離問題結束還有
Developments in the modern reinforced concrete design and construction practice were pioneered by European engineers in the late 9th century.
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