大部分在古生代岩层中发现的化石都是没有脊骨的无脊椎动物，例如珊瑚、软体动物和三叶虫。
Most of the fossils seen in Paleozoic rocks are invertebrate animals lacking backbones, such as corals, mollusks and trilobites.
本剂含有维生素、微量元素、脂肪和氨基酸等营养成分，能激发珊瑚、海葵、管虫和其他软体无脊椎生物的进食。
A mixture of vitamins, nutrients, trace elements, trace elements, lipids and amino acids which arouse feeding behaviour in corals, anemones, tube worms and other benthic Marine invertebrates.
无脊椎动物，如软体虫，是这些水鸟的主要食物。
Invertebrates, such as worms, are the main diet of these water birds.
无脊椎动物，如软体虫，是这些水鸟的主要食物。
Invertebrates, such as worms, are the main diet of these water birds.
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