n.

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

   他們是美國西部的開拓者。

2. 先驅者，開拓者[（+in/of）]
   Henry Ford was a pioneer in the auto industry.

   亨利‧福特是汽車工業的先驅。

3. 【軍】輕工兵

vt.

1. 開闢，倡導
   This company pioneered on-job training.

   這一公司首創在職培訓。

vi.

1. 當先驅，成為開拓者[（+in）]
   The Wright brothers pioneered in early aviation.

   萊特兄弟是早期航空的先驅。

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.