短語詞組短語pollen n grain 花粉粒four -flodj pollen-grain 四郃花粉粒Pollen grain formation stage 花粉粒形成期pollen grain of 花粉中造粉impotence of pollen grain 花粉粒不育Pollen grain morphology 花粉形態(tài);花粉粒形態(tài)compound pollen grain 複花粉粒single pollen grain 單花粉粒pollen grain germination 花粉粒萌發(fā) 返回 pollen grain