每一种双糖都是由两个多糖组成.用英语怎么说？

每一种双糖都是由两个多糖组成.

Each disaccharide is composed of two monosaccharides.

each

adj. 每，各自的；pron. 每个，各自；

例句
They were completely absorbed in each other...
两人彼此倾心。

disaccharide

n. 二糖，双糖；

例句
Cellulase An enzyme that hydrolyzes 1, 4 - glycosidic linkages in cellulose, yielding cellobiose ( a disaccharide ) and glucose.
一种能够水解纤维素中1, 4-糖苷键, 生成纤维二糖 ( 一种二糖 ) 和葡萄糖的酶.

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

composed

adj. 镇静的，沉着的；v. 组成( compose的过去式和过去分词 )，调解，[印刷]排（字），使安定；

例句
A methane molecule is composed of one carbon atom attached to four hydrogens.
甲烷分子由1个碳原子与4个氢原子构成。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

two

n. 两个，两个东西，两点钟，一对；adj. 两个的，我

例句
He has been absent from his desk for two weeks...
他已经有两个星期没有坐在办公桌前了。