两侧对称动物
- 网络bilateral animal;Bilateria;Three germ layers＆Bilateria;Three germ layers&Bilateria
两侧对称动物-
状况变得很清楚：只有真实的化石，才能为两侧对称动物出现的时间提供确凿的证据。
It had become clear that only actual fossils would furnish incontrovertible evidence for the time at which bilaterians had emerged .
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而分布在地球上数个地区的艾迪卡拉特异埋藏点（名自首次发现的澳洲艾迪卡拉山）里面藏有奇妙的前寒武纪软体化石与虫穴，包括早期两侧对称动物的证据。
And , at several spots on the planet , the Ediacaran lagerst ? Tten , named after the Ediacara hills of Australia where the first example was found , harbor strange Precambrian soft-bodied fossils and animal burrows , including evidence for early bilaterians .