更多premolar例句

1. The lower premolar is tricuspidate and the first and second molars are quadritubercular with a broad cingulum.
2. We have examined the specimen (70228 BS), which retains the upper deciduous premolar.
3. The New World monkeys, on the other hand, have an additional premolar in each half-jaw, or thirty-six teeth altogether.
4. The third premolar is very large, and agrees with its upper one, excepting the lobule on the inner border.
5. In the Cebidae there is an extra premolar in each jaw bringing the number up to 36.