| 单词 | class Hydrozoa |
| 例句 | The simplest in structure of the cœlenterates are those that constitute the class Hydrozoa. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Other cœlenterates, of the same essential type but of simpler structure, form the class Hydrozoa. The Contemporary Review, Volume 36, September 1879 Cordylophora is a normal genus of the class Hydrozoa and the order Gymnoblastea; the next four genera are certainly Hydrozoa, but their affinities are very doubtful. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z |
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