1. That is a rare usage of this word. 那是这个单字的一种罕见的用法。
2. Such people as you describe are rare now. 你描写的这种人现在已很少见了。
3. The doctor diagnosed my illness as a rare bone disease. 医生诊断出我的病是一种罕见的骨病。
英英解释
adj.
1. not widely known; especially valued for its uncommonness
2. recurring only at long intervals
3. not widely distributed
4. marked by an uncommon quality; especially superlative or extreme of its kind
5. having low density
6. (of meat) cooked a short time; still red inside