这种现象就是“同期复孕”(superfecundation): “..
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N the fertilization of two or more ova, produced during the same menstrual cycle, by sperm ejaculated during two or more acts of sexual intercourse 同期复孕 [physiol]
A reasonable way of improving panda resource should be mainly based upon superfecundation at ovulation period.
合理利用大熊猫资源应以排卵期超受精为主要途径。
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