例句與造句

1. The origin of the first palmar interosseous muscle is on the ulnar aspect of the base, and can sometimes extend onto the shaft . In contrast to the other metacarpals, the first metacarpal has no articular facets on the sides of its base ( for intermetacarpal articulations ) because it articulates exclusively with the trapezium.
2. It's difficult to find intermetacarpal articulation in a sentence. 用intermetacarpal articulation造句挺難的