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Pectins are demonstratet by staining with ruthenium red.是什么意思？

Pectins are demonstratet by staining with ruthenium red.

可以用钌红来鉴定果胶.

相关词汇
are by staining with red

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

staining

n. 着色；v. （使）染色( stain的现在分词 )，褪色，变污，玷污，败坏（名声）；

with

prep. 和，跟，随着，关于，和…一致；

red

adj. 红色的，（脸）涨红的，烧红的，红头发的；n. 红色，红衣服，红颜料，红葡萄酒；
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