例句
The major components of PM are sulfate, nitrates, ammonia, sodium chloride, carbon, mineral dust and water.
它的主要组成成分是硫酸盐、硝酸盐、氨、氯化钠、碳、矿物粉尘和水。
Cellulose sulfate was one of four compounds being evaluated in large-scale studies of effectiveness among women at high risk of HIV infection.
硫酸纤维素是对艾滋病毒感染高危妇女有效性的大规模研究中正在评价的四种化合物之一。