a.

1. 纯粹的，不搀杂的；道地的
   Is the cup made of pure gold?

   这只杯子是纯金做的吗？

2. 纯净的；洁净的；清澈的
   The air by the sea is pure and healthy.

   海边的空气清新又有益健康。

3. 纯洁的，清白的；贞洁的
4. （颜色、声音）纯的；清亮的
5. 完全的，十足的[Z][B]
   It was pure luck that he was home when we called.

   非常幸运，我们打电话时他在家里。

6. 纯理论的；抽象的[B]

adj.

1. not mixed or adulterated with any other substance or material.
   ▸ (also pure-bred) (of an animal or plant) of unmixed origin or descent.
2. innocent or morally good.
3. (of a sound) perfectly in tune and with a clear tone.
4. (of a subject) theoretical rather than practical. Compare with applied.
5. complete; nothing but.
6. Phonetics  (of a vowel) not joined with another to form a diphthong.