[古生]?背鞍
... dorsal root of sac 气囊背基 dorsal saddle 背鞍 Dorypteridae 枪鳍鱼科 ...
Borrowman pointed out a distinctive pale-grey saddle patch behind the dorsal fin and identified the orca as one he sees frequently: a 43-year-old male known as A38.
BBC: A quest to see Canada??s orcas in the wild
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。