difficult ground
读音:
美
英
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on difficult ground 在困难的土地上
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tbm tunnelling in difficult ground conditions 困难地面条件下tbm隧道施工
difficult ground是什么意思 difficult ground怎么读 difficult ground在线翻译 difficult ground中文意思 difficult ground的解释 difficult ground的发音 difficult ground意思是什么 difficult ground怎么翻译 difficult ground的中文翻译 difficult ground的意思翻译 difficult ground在线翻译查询 给力英汉词典