starch grain短语¹⁴⁴⁹⁷²⁺² 基本例句 淀粉粒 All of the fibrous roots of Cycas tend to develop into fleshy roots, whose cortex consists of80 layers of biggish parenchyma cells that contain abundant starch grain and tannin. 苏铁属植物的须根均庞大成肉质根，其皮层由多达80层大型的、含有大量淀粉和单宁物质的薄壁细胞组成。 cnki