1、 They discovered that the upper and lower front teeth of ancient human adults were aligned (对齐), making it hard to produce labiodentals, which are formed by touching the lower lip to the upper teeth.
他们发现,古人类成年人的上门牙和下门牙是对齐的(对齐),因此很难产生唇碘牙,而唇碘牙是由下唇接触上牙形成的。
来源:2022年普通高等学校招生全国统一考试(新高考I卷)
2、 He had nice square white teeth.
他有整齐洁白的漂亮牙齿。
来源:秒词邦精选例句