在这个地区下雪是很罕见的。

It is ___rare to see snow in this region.

这个动物园有许多来自世界各地的珍稀动物。

The zoo has many ___rare animals from all over the world.

找到四叶草被认为是罕见且幸运的。

Finding a four-leaf clover is considered ___rare and lucky.