centrist

n. 中间党派的成员, 温和主义者
【法】 中间派议员, 中立派议员

cen.trist

n.（名词）
One who takes a position in the political center; a moderate.
中立派：在政治上持中间立场的人；温和派
adj.（形容词）
Marked by or adhering to a moderate political view:
温和派的：坚持温和政治观点或以此为特征的：
例句：
.The deep pool of centrist opinion in the country, that essential guarantee against violent political upheavals, is being dangerously shaken.(New York Times)
.这个国家根深蒂固的温和派立场、那种反对剧烈政治动荡的根本保障现在正危险地发生动摇.(纽约时报)