| 单词 | 类物质 |
| 释义 | 〔tannin〕Any of various chemically different substances capable of promoting tanning.丹宁酸类物质：任一种能使硝皮过程更为活跃的化学结构不同的物质〔basipetal〕Of or relating to the development or maturation of tissues or organs or the movement of substances, such as hormones, from the apex downward toward the base.向基的：与组织或器官的形成发展或与如荷尔蒙类物质运动有关的，从顶部向下往基部运动 |
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