Comparative observations were made on the morphology and anatomy of secretory cavities in stems of 14 genera, 23 species and one varieties by paraffin and thin section method.是什么意思_Comparative observations were made on the morphology and anatomy of secretory cavities in stems of 14 genera, 23 species and one varieties by paraffin and thin section method.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句