This top fits over the bottle and keeps the teat sterile.
这子严实地
瓶上,保持
菌。
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This revolving cycle of pregnancy means that after a female swamp wallaby gives birth to her first baby from one uterus, a second embryo lies dormant in her other uterus, while the first baby attaches to a teat within her pouch.
种循环
怀孕周期意味着在
只雌性沼泽袋鼠从
子宫生下她
第
孩子后, 第二
胚胎在她
另
子宫中处于休眠状态,而第
婴儿则附着在她育儿袋中
奶头上。