请教这句 “The major imaging feature that helps distinguish angiomyolipoma from liposarcoma is the ‘‘beak sign’’ or a small divot at the interface of the mass with the kidney, often accompanied by a feeding vessel; both signs indicate a renal origin”怎么翻译,beak sign翻译为鹰嘴征,对吧,这个单词 small divot ,请教怎么翻译。多谢。