这个词是什么意思？
The species Balaenoptera physalus, in the family Balaenopteridae, characterized by a large, strongly curved, dorsal fin. It is the second largest of the WHALES, highly migratory, but rarely seen near the shore.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D050617 · MeSH 2026。
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