一双一对用英语怎么说_一双一对英文怎么写

One pair and one pair

一双一对───One pair and one pair

each pair of pictures differed by gender and ethnicity, and each pair of pictures included one child with glasses and one child without glasses.───每组照片包括两张，一张照片上的孩子戴眼镜，另一张的不戴眼镜，而且每组照片中孩子的性别和民族都不同。