12 篇文章
carefully using their sonar to scan the forest floor for fish.
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carefully using their sonar to scan the forest floor for fish. 仔细地用声纳扫描林地表层寻找鱼类为食

which it wipes carefully into it's jaws.
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which it wipes carefully into it's jaws. 然后将挑选过的食物送进嘴里