sixthn.六分之一；六度音num.第六Sixth cervical vertebra第六颈椎sixth longitudinal vein第六纵脉Sixth right aortic arch第六右主动脉弓sixth-form certificate第六学级证书Sixth Battle of Damascus第六次大马士革之战(1401)Sixth cranial nerve disease第六脑神经疾病sixth industrial revolution第六次产业革命Sixth cranial nerve nucleus第六脑神经核Sixth is cooldown group time第六项表示冷却组时间Sixth cranial nerve disorder第六脑神经病症

1. The sixth grade saw an educational film yesterday.
   六年级学生昨天看了一部教育片。
2. His eldest child is still in the sixth form.
   他年龄最大的孩子才上六年级。