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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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你只管先往前走。我随后就来。
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Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
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他坐在那儿，听我陈述解雇他的理由。
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一份耕耘，一份收获。
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