pioneer

[paɪə'nɪə]

释义

n.参与西进运动的先驱者
one who is among those who first enter or settle a region:
the early pioneers in the western part of the U.S

例句
Rachel: He was helping his niece with her report on the pioneers.(Friends)
瑞秋：他正帮他侄子写一篇关于参与西进运动的文章。（老友记）