sexine

常见例句

There is some space between sexine and nexine.
外层电子密度相对较小，内层电子密度相对较大；
The exine of pollen wall is of different electron density, the nexine dense and the sexine, comprising tectum, bacules, and foot layer, relatively thin.
花粉壁的外壁分为外层和内层，外层包括覆盖层、基粒棒和基足层等三层，内层只包含一层。
the sexine and nexine are separated and form remarkable vestibulum.Uunder the optical sect ion view, nexine thickens in the apertural region.
光学显微镜下，4-5孔，孔的结构特殊，内、外层到孔边分离，形成显著的孔室。