bivalent + noun
bivalent 常作定语修饰化学名词。
Bivalent elements form compounds with a valence of two.
二价元素形成化合价为二的化合物。
二价的
联会时成对结合的(同源染色体);二价的,具有两个化合价的;(同源染色体)在联会时成对结合的;二价的;[化] 二价的
having a valence of two; having two valences
化学术语
二价的,具有两个化合价的
having a valence of two or having two valences
(同源染色体)在联会时成对结合的
used of homologous chromosomes associated in pairs in synapsis
In this compound, oxygen is bivalent, so it can combine with two hydrogen atoms.
在这种化合物中,氧是二价的,因此它能与两个氢原子结合。
用法提示:bivalent 在此作表语形容词,表示‘二价的’(化合价为二)。
The bivalent metal reacted with the acid to produce a salt.
这种二价金属与酸反应生成了一种盐。
用法提示:bivalent 作前置定语修饰 metal,意为‘二价的’。)
Bivalent ions such as magnesium play a vital role in enzyme function.
镁等二价离子在酶的功能中起着重要作用。
用法提示:bivalent 作前置定语修饰 ions,指‘二价的’离子。
bivalent 常作定语修饰化学名词。
Bivalent elements form compounds with a valence of two.
二价元素形成化合价为二的化合物。
In this reaction, the metal ion is bivalent.
在此反应中,该金属离子是二价的。
grammar · medium
易错句子This shellfish has a bivalent shell.
正确表达This shellfish has a bivalve shell.
混淆了“bivalent”(二价的)与“bivalve”(双壳的)两个词。前者常用于化学描述价态,后者用于生物学描述双壳结构。应使用“bivalve”表达双壳特征。
grammar · medium
易错句子This atom is a bivalent.
正确表达This atom is bivalent.
“bivalent”是形容词,不需要冠词“a”。中文母语者常因直译“一个二价的”而误加冠词。正确用法是直接作表语。
与bivalent同义,但divalent更常用于无机化学,bivalent在生物化学中更常见。
bivalent指化合价,bivalve指有两个壳的软体动物,拼写和发音相近但含义完全不同。
ambivalent表示情感上的矛盾,bivalent是化学术语,二者发音和拼写有相似后缀但意义无关。
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