| 单词 | 双壳类 |
| 释义 | 〔drill〕Any of various marine gastropod mollusks, chiefly of the genusUrosalpinx, that bore holes into the shells of bivalve mollusks. U. cinera is destructive to oysters. 海洋腹足动物：海洋腹足纲软体动物，主要指在双壳类软体动物的贝壳上钻孔的骨螺 属。该属的 尾角螺 对牡蛎十分有害 〔lamellibranch〕Any of the bivalve mollusks of the class Lamellibranchia, including the clams, scallops, and oysters. Also called pelecypod 瓣鳃纲软体动物：任一种属于瓣鳃纲的双壳类软体动物，包括蛤、蚝、扇贝、牡蛎 也作 pelecypod〔spat〕An oyster or similar bivalve mollusk in the larval stage, especially when it settles to the bottom and begins to develop a shell.幼牡蛎：幼虫时期的牡蛎或类似双壳类软体动物，尤指在海底开始开壳的〔spawn〕The eggs of aquatic animals such as bivalve mollusks, fishes, and amphibians.卵：双壳类软体动物、鱼类和两栖动物的水生动物的卵子〔bivalve〕A mollusk, such as an oyster or a clam, that has a shell consisting of two hinged valves.双壳类：一种软体动物，如牡蛎或蛤，有由两个开合的瓣组成贝壳的动物〔cockle〕Any of various bivalve mollusks of the family Cardiidae, having rounded or heart-shaped shells with radiating ribs.鸟蛤：鸟蛤科双壳类软体动物，有放射状翅脉的圆的或心形外壳 |
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