He moved into the new house and bought some flowers of different varieties.
of different varieties 作什么成分呢？
variety 表示“类型”，跟kind 是一样的使用方法。比对如下：
1. He moved into the new house and bought some flowers of different varieties.
（of different varieties 后置定语）
2. He moved into the new house and bought some different varieties of flowers.
（different varieties of 前置定语）
3. He moved into the new house and bought some flowers of different kinds.
（of different kinds 后置定语）
4. He moved into the new house and bought some different kinds of flowers.
（different kinds of 前置定语）
