The middle part sealed with drown wax, it's now the area to hatch the pupas of working bees.
中间有褐色蜡封的部份，它现在正是孵化工蜂『蜂蛹』的区域。
Analysis of Free Amino Acids in Homogenate of the Eggs, Larvae and Pupas of Culex Pipiens Quinqefasciatus
致倦库蚊发育各期卵、幼虫及蛹匀浆中的游离氨基酸
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