| 单词 | Hesperornithiformes |
| 释义 | Hesperornithiformes [´hes·pǝ´rȯr´nith·ǝ`fȯr´mēz] PALEONTOLOGY An order of ancient extinct birds; individuals were large, flightless, aquatic diving birds with the shoulder girdle and wings much reduced and the legs specialized for strong swimming. |
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