单词：trench excavation
单词：trench excavation 相关文章
puma 美洲狮 Pumas are large,cat-like animals which are found in America. 美洲狮是一种体形似猫的大动物，产于美洲。 The ears and tail tip of pums are generally dark. 美洲狮的耳和尾尖通常是呈深色。 Kitten pumas are
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[00:01.47]B On Christmas morning we stuck up a board [00:05.21]with A Merry Christmas on it. [00:07.56]The enemy has stuck up a similar one. [00:10.28]Two of our men then threw their equipment off [00:13.23]and staggered out of the trench [00:14.97]w
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Mars Rover Digs Trench to Search for Evidence of Water David McAlary One of the U.S. Mars rovers has spun a wheel to dig a shallow trench in the sand in the continuing search for evidence that water o
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