"the dorsal fin is the vertical fin on the back of a fish and certain marine mammals"
"the abaxial surface of a leaf is the underside or side facing away from the stem"
The dorsal and anal fins.
A dorsal ridge of slate-coloured rock.
Midwives sometimes prefer to have women in a dorsal or modified lithotomy position for examination.
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)