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Why does the Greenland Paddle work?
为什麽使用格陵兰桨是可行的？
youdao
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Work was done in turning the paddle wheel against the resistance of the water.
转动搅拌轮，克服水的阻力做功。
youdao
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Work was done in turning the paddle wheel against the resistance of the water.
转动搅拌轮，克服水的阻力做功。
youdao