Amino acid analysis shew that the ratios of basic to acidic amino acid of GO isozyme and its 40kD acidic subunit were 0. 66 and 0. 54, respectively, implying 40kD subunit was a acidic protein, 66kD band was a basic protein. 用制备性SDS-PAGE法获得菜心GO同工酶的40kD亚基，并和菜心GO同工酶一起测定其氨基酸组成，该GO同工酶及40kD亚基的碱/酸性氨基酸的比例分别为0.
He gave me a taste of his acid wit. 他让我尝到了他敏锐尖刻之机智的滋味。
Acid irritates the stomach lining. 酸能刺激胃黏膜。
Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
The soil becomes more and more acidic as pollution mounts up. 随着污染的加剧，土壤的酸化越来越严重。
I am doing an experiment of neutralizing acid. 我在做一个中和酸的实验。