名詞 backbench:

1. any of the seats occupied by backbenchers in the House of Commons

back.bench

n.（名詞）
Chiefly British The rear benches in the House of Commons where junior members of Parliament sit behind government officeholders and their counterparts in the opposition party.
【多用于英國】 后座議員席：英下議院后排座的議員席，議會(huì)中職位較低的成員坐在政府官員和對(duì)立黨成員的后面
New members of Congress considered as a group:
議會(huì)新成員：議會(huì)的一組新成員：
例句：
.a revolt of the backbench fueled by a powerful lobbying campaign.(Washington Post)
.被強(qiáng)大的游說議員運(yùn)動(dòng)煽動(dòng)的由新議員組成的反抗活動(dòng).(華盛頓郵報(bào))

【引伸】
backbench.er
n.（名詞）