The outer wall (extine) of the pollen grain is often diagnostic (see pollen) and very resistant to decay.
花粉粒外壁（花粉壁）通常为特异性
并很难腐烂。
The outer wall (extine) of the pollen grain is often diagnostic (see pollen) and very resistant to decay.
花粉粒外壁（花粉壁）通常为特异性并很难腐烂。
声
：以上例句、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件
观点；若发现问题，欢迎向我们指正。
