n.

1. 拓荒者
   They were the pioneers of the American West.

   他们是美国西部的开拓者。

2. 先驱者，开拓者[（+in/of）]
   Henry Ford was a pioneer in the auto industry.

   亨利·福特是汽车工业的先驱。

3. 【军】轻工兵

vt.

1. 开辟，倡导
   This company pioneered on-job training.

   这一公司首创在职培训。

vi.

1. 当先驱，成为开拓者[（+in）]
   The Wright brothers pioneered in early aviation.

   莱特兄弟是早期航空的先驱。

n.

1. a person who is the first to explore or settle a new country or area.
2. an innovator or developer of new ideas or techniques.
3. a member of an infantry group preparing roads or terrain for the main body of troops.

v.

1. be a pioneer of.
2. open up (a road or terrain) as a pioneer.