pioneer [ˌpaɪəˈnɪə(r)]

以下由轻松背单词网站提供

n.先锋，拓荒者，开劈者；v.提倡，作先驱，开劈

a person who is one of the first people to do something

He was the pioneer of photography. 他是摄影术的倡导者。
His pioneer group chose him as their leader. 他所在的少先队选他当了队长。