0 not common; very unusual -- 稀少的；罕见的；不常发生的
It's very rare to find someone who combines such qualities. 具有此类综合素质的人是非常罕见的。
[ + to infinitive ] It's very rare to find these birds in New England in winter. 在新英格兰地区，冬天很少能看到这种鸟。
a rare occasion/opportunity/visit/treat, etc. 难得的时机／机会／探访／款待等
The museum is full of rare and precious treasures. 这家博物馆里收藏的满是奇珍异宝。
1 (of meat) not cooked for very long and still red -- （肉）煮得半熟的，煎得嫩的
2 used to describe the air at the top of a mountain, which contains less oxygen, making it harder to breathe -- （山顶空气）稀薄的
Consider first the fact that faucal consonants are relatively rare in languages of the world.
In unilinguals, conceptual features may be transferred from a frequently used word to its rare quasi-synonym, possibly from a different sociolinguistic register.
In the four remaining polymorphisms, the rare allele is at most present in three sequences out of 20.
There are good teachers in higher education who organize such debates, but they are rare.
On the rare occasions where we present definitions out of sequence, we will explain what we are doing.
Rare observations of important events such as birth, predation, innovation, and teaching can be vitally important in directing research toward potentially important areas.
In the same way, high-rent streets were rarely of high density, and severe crowding (two or more persons per room) was rare among highrent households.
Rare species in communities of tropical insect herbivores: pondering the mystery of singletons.
