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They power a blade in the water that the pilot can adjust to reduce drag.
他们在水中为一个划片供能，因此驾驶者可以调整以降低拖力。
youdao
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The blade of the oar had entangled itself with something in the water.
船桨的桨叶和水里的什么东西缠住了。
youdao
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The blade of the oar had entangled itself with something in the water.
船桨的桨叶和水里的什么东西缠住了。
youdao