... Euprioniodina优似锯牙形石属 euprofundal深湖底的 EUR估算最终储量 ...
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有人惯于说，甚至在这样平静的、沙底的湖中有着深而危险的窟窿，可是若有这种情况，湖水早把湖底的不平一律夷为平底了。
Some are accustomed to speak of deep and dangerous holes even in quiet sandy ponds like this, but the effect of water under these circumstances is to level all inequalities.
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