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They could not move their heavy mortars over the swampy ground.
他们无法把重型迫击炮移过那片沼泽地。
youdao
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The industry of mortars dates early from the end of the 19th century.
砂浆工业早在19世纪末期就开始了。
youdao
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The industry of mortars dates early from the end of the 19th century.
砂浆工业早在19世纪末期就开始了。
youdao