The outer wall (extine) of the pollen grain is often diagnostic (see pollen) and very resistant to decay.
粒外壁(
壁)通常为特异性
难
烂。
声明: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的观点;若发现问题,欢迎向我们指正。
Having found a female tree exactly sixty yards from a male tree, I put the stigmas of twenty flowers, taken from different branches, under the microscope, and on all, without exception, there were a few pollen-grains, and on some a profusion.
在距离一棵雄树正好 60 码处找到一棵雌树后, 我把从不同树枝上摘下的 20 朵花的柱头放在显微镜下,所有的花无一例外地有一些花
,
在一些花
上则是大量的.