pollen cloud
... 近交inbreeding 花粉云pollen cloud 领域neighbourhood ...
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云杉花粉 Picea pollen
苏铁雄球果的结构与花粉的风传播相当一致，花粉云从一些较大的球果中释放出来。
The structure of cycads male cones is quite consistent with the wind dispersal of pollen, clouds of which are released from some of the larger cones.
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