sexine

基本解释

• 外層(孢粉)

同根派生

英汉例句

• There is some space between sexine and nexine.
  外層電子密度相對較小，內層電子密度相對較大；
• The exine of pollen wall is of different electron density, the nexine dense and the sexine, comprising tectum, bacules, and foot layer, relatively thin.
  花粉壁的外壁分爲外層和內層，外層包括覆蓋層、基粒棒和基足層等三層，內層衹包含一層。
• the sexine and nexine are separated and form remarkable vestibulum.Uunder the optical sect ion view, nexine thickens in the apertural region.
  光學顯微鏡下，4-5孔，孔的結搆特殊，內、外層到孔邊分離，形成顯著的孔室。