It also had a second jaw joint made up of the same two bones as the jaw joints of all living mammals - the dentary or mandible, and the squamosal.
它还有第二个下颌关节, 由与所有现存哺乳动物的下颌关节相同的两块骨头组成——齿骨或下颌骨,以及鳞骨。
单词 | squamosals |
例句 |
原声例句
PBS地球-动物趣闻 It also had a second jaw joint made up of the same two bones as the jaw joints of all living mammals - the dentary or mandible, and the squamosal. 它还有第二个下颌关节, 由与所有现存哺乳动物的下颌关节相同的两块骨头组成——齿骨或下颌骨,以及鳞骨。 |
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