secondary substances

• 次生物质

secondary substances的用法和样例：

例句

1. Besides from the above-mentioned typical characters of hypersensitive reaction, the host cells also produced defense structure in cell walls and secondary metabolic materials.
   除了上述典型的过敏性坏死反应特徵以外，寄主细胞还产生了细胞壁防御结构和次生物质。