同根派生 英汉例句Chromeplating liuthium is mainly used for chromic acid and sulphuric acid.镀铬用的电解液次给是铬酸酐和硫酸。Suitable anhydrides for use in this process include phthalic, maleic, and succinic.适用于本法的酸酐有苯二甲酸，马来酸及琥珀酸的酸酐。