a.

1. 稀有的，罕见的
   These flowers are very rare in this country.

   这些花在该国很少见。

2. 杰出的，珍贵的
   Gold is a rare metal.

   金子是贵重金属。

3. 稀薄的，稀疏的
   The higher you climb up the mountain, the rarer the air is.

   越往山上爬，空气越稀薄。

4. 【口】非常好的，极度的[B]
   Edison had rare powers as an inventor.

   爱迪生具有罕见的发明天才。

a.

1. （肉等）半熟的，煮得嫩的
   I had a rare beef steak.

   我吃了一块做得很嫩的牛排。

adj.

1. occurring very infrequently.
   ▸existing in small numbers and so of interest or value.
2. remarkable:
   a player of rare skill.

adj.