n.[C]

1. 宝石；宝玉
2. 宝物，珍品
   This yacht is really a gem.

   这只游艇确实精美无比。

3. 难能可贵的人；十分受人喜爱的人

vt.

1. 用宝石镶嵌
2. 点缀
   Stars gem the sky.

   星星点缀着天空。

n.

1. a precious or semi-precious stone, especially when cut and polished or engraved.
2. an outstanding person or thing.