sexine

基本解释

• 外层(孢粉)

同根派生

• sexine相关词

英汉例句

• 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。

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