secretory duct meaning in English

分泌导管
分泌管

Abstract : the resource distribution of aralia elata in northeast china were investigated . by means of the optical microscope , the features of histology and powder of cortex of this plant were first examined . in the cortex , threre are a large number of secretory ducts and a small quantity of druses of calcium oxalate
文摘:对分布在我国东北地区的药用植物辽东?木的资源进行了调查，以光学显微镜对其根皮的组织和粉末进行了观察，其根的皮层较层，并含有大量的树脂道，粉末具有大量的淀粉粒及少量草酸钙结晶