a.

1. 天然的，生的，未经加工的
   The country exports lots of crude oil.

   这个国家出口大量原油。

2. 粗野的，没教养的
   His crude manners offended her.

   他的粗野举止触怒了她。

3. 粗糙的，粗陋的
   The great man is said to have been born in a crude hut.

   据说那个伟人生于一个简陋的小屋里。

adj.

1. in a natural or raw state; not yet processed or refined:
   crude oil.
2. made or done in a rudimentary or makeshift way:
   a relatively crude nuclear weapon.
   ▸(of an estimate) approximate.
3. offensively coarse or rude, especially in relation to sexual matters.
4. Statistics  (of figures) not adjusted or corrected.

n.