1
a bivalve
作名词时为可数名词，指双壳类动物；复数形式是 bivalves。
A bivalve has two shells joined by a hinge.
双壳类动物有两片由铰合部连接的壳。
双壳类动物
bivalves — plural of bivalve
先理解核心含义，再看它在真实句子里的用法。
双壳类动物
a marine or freshwater mollusk having a soft body with platelike gills enclosed within two shells hinged together
A bivalve has two shells joined by a hinge.
双壳类动物有两片由铰合部连接的壳。
双壳纲软体动物,壳由两片铰合部分组成,如扇贝、蛤、贻贝和牡蛎。
Any mollusc belonging to the taxonomic class Bivalvia, characterized by a shell consisting of two hinged sections, such as a scallop, clam, mussel or oyster.
果皮,开裂或分成两瓣的。
A pericarp in which the seedcase opens or splits into two parts or valves.
The oyster is a bivalve that lives attached to rocks.
牡蛎是一种附着在岩石上生活的双壳类动物。
Many bivalves can filter large amounts of water to feed.
许多双壳类动物能够过滤大量的水来觅食。
A scallop is a bivalve with two beautiful shells.
扇贝是一种拥有两片美丽贝壳的双壳类动物。
作名词时为可数名词，指双壳类动物；复数形式是 bivalves。
A bivalve has two shells joined by a hinge.
双壳类动物有两片由铰合部连接的壳。
作形容词时意为“有两片壳的”，通常作定语，后接名词，如 bivalve mollusk。
Clams and oysters are bivalve mollusks.
蛤蜊和牡蛎是双壳类软体动物。
Not this
There are many bivalve in this sea.
Use this
There are many bivalves in this sea.
bivalve 是可数名词，复数应在词尾加 -s。汉语名词没有复数变化，所以容易漏掉；many 后必须用复数形式 bivalves。
Not this
Bivalves mollusks are common in the ocean.
Use this
Bivalve mollusks are common in the ocean.
名词复数 bivalves 不能放在 mollusks 前作定语；修饰名词时应使用形容词形式 bivalve，不加 -s。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
双壳软体动物
Clams, oysters, and mussels are bivalve mollusks.
蛤蜊、牡蛎和贻贝都是双壳软体动物。
海洋双壳类
Marine bivalves are an important source of food worldwide.
海洋双壳类是全世界重要的食物来源。
双壳类壳
A pearl forms inside the bivalve shell.
珍珠形成于双壳类的壳内。
淡水双壳类
Many freshwater bivalves are threatened by habitat loss.
许多淡水双壳类因栖息地丧失而受到威胁。
可食用双壳类
Edible bivalves such as scallops are rich in protein.
扇贝等可食用双壳类富含蛋白质。
双壳类物种
Scientists identified a new bivalve species in the deep sea.
科学家在深海中识别出一个新的双壳类物种。
Use bivalves naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
bi-像“二”，valve像壳片：bivalve就是两片壳合起来的蛤蜊。
语域：formal 常见场景：biology/zoology、seafood industry、academic writing bivalve 是较正式的专业用语，多用于生物学、海洋学或渔业等书面/专业语境；日常口语中更常直接说 clam（蛤蜊）、mussel（贻贝）、oyster（牡蛎）等具体贝类名称。
bivalve 读作 /ˈbaɪvælv/，重音在第一音节。词尾 -valve 在 valve、univalve 中相同，但这两个词的重音元音不同，所以不和 bivalve 押韵。前缀 bi- 在 bicycle、biology 中同样读 /baɪ/。alive、arrive 以 /aɪv/ 结尾，与 bivalve 开头的 /baɪ/ 有相似之处，但结尾不是 /vælv/。注意 valve 中的 a 读 /æ/，不要读成 /eɪ/。
Dictionary facts from ECDICT, WIKTIONARY.