例句與造句

1. Projecting into the floor of the antrum are several conical processes, corresponding to the roots of the first and second maxillary molar teeth; in some cases the floor can be perforated by the apices of the teeth.
2. "" Babakotia " has especially elongated upper premolars with shallow paracristas and metacristas; a mesial projection of the crown of the anterior upper premolar well beyond the mesial root of the tooth; fine enamel crenulations on the occlusal surfaces of the molars; incipient bilophodonty of the second maxillary molar; and a relatively large upper third molar with four distinct cusps . " ( Nowak, 1999)
3. It's difficult to find second maxillary molar in a sentence. 用second maxillary molar造句挺難的