The cheek-teeth strongly curved, forming from the base to the summit about a quarter of a circle, the concavity being directed outwards in the upper and inwards in the lower teeth.
that is ..a concave exists in this image or not .. and its degree I found the question interesting, so I decided to look around the internet a little. It's an interesting topic--what are you..查看文章
concavity与发音含义,同义词,反义词,翻译,刑和更多的