这个词是什么意思？
The species Balaena mysticetus, in the family Balaenidae, found in the colder waters of the Northern Hemisphere. The common name is derived from the extreme arching of the lower jaw.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D050642 · MeSH 2026。
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