vary between A and B
问题描述:
vary between A and B
eg class numbers vary between 25 and 30
答
eg class numbers vary between 25 and 30 这句话是:
例:班级数介於二十五与三十之间不等.
而 vary between A and B是:
介于A与B之间变化不一 (依情况而定的意思).