例句與造句

1. Distal segment of fingers are blunt, not expanded, with roundish sub-articular tubercles ( one on 1st and 2nd fingers; two on 3rd and 4th fingers ), supernumerary tubercles are present on each palm, two metacarpal tubercles are present, webbing is absent as is the nuptial pad, and subcutaneous glands are present on the base of the 1st finger.
2. It's difficult to find metacarpal tubercle in a sentence. 用metacarpal tubercle造句挺難的