稀有的东西怎么说英语

To describe something as rare in English, you can use the word "rare" or "uncommon." For example:
"This type of flower is rare. You don't see it very often."
"This type of coin is uncommon. It's not something you come across every day."
You can also use the phrase "not very common" to describe something that is rare. For example:
"This type of bird is not very common in this area. You're lucky to have seen one."
"This type of gemstone is not very common. It's highly prized for its rarity."