基本解释[医药科学]丹宁英汉例句双语例句The content of simple phenols and hydrolyzable tannins were very low and their variations were not significant during autumn and winter.试材枝内简单酚类物质和可溶性单宁含量极低，且在秋冬季节无显著变化。hydrolyzable tannins更多例句专业释义医药科学丹宁