但是，最近北美的内陆水道、码头和淡水入口蔓生了一种原存于黑海区域的斑马蛤贝和白斑马蛤贝。
But recently the inland waterways, docks and fresh-water intakes of North America have been overrun by zebra and quagga mussels-species that originate from the area around the Black Sea.
水产养殖在控制条件下，科学、艺术及商业性培植海水或淡水食用鱼或介壳类，如牡蛎、蛤、鲑及鳟鱼。
The science, art, and business of cultivating Marine or freshwater food fish or shellfish, such as oysters, clams, salmon, and trout, under controlled conditions.
水产养殖在控制条件下，科学、艺术及商业性培植海水或淡水食用鱼或介壳类，如牡蛎、蛤、鲑及鳟鱼。
The science, art, and business of cultivating Marine or freshwater food fish or shellfish, such as oysters, clams, salmon, and trout, under control led conditions.
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