a pair of

例句：

1. 1. She wore apair of glasses to protect her eyes fromthe bright sunlight.
   她戴着一副眼镜，以防眼睛受到刺眼阳光的伤害。
2. 2. Theyhad a pair of shoes that matched perfectlywith their outfit.
   他们有一双鞋子，与他们的衣着完美匹配。
3. 3. Theteacher gave a pair ofkeys to each student as areward for good behavior.
   老师给每个学生一对钥匙，作为良好行为的一个奖励。