相关单词同義詞medium, supporting, middle, minor, moderate, deputy, agent, factor, proxy, 近義詞 lesser, smaller反義詞primary, superior臨近詞secondhand, second, secondary bus, secondary air, secondary gap, secondary bud, secondary eye, secondary tin, secondary arm, secondary bow, secondary dam, secondary PSV相似詞second-guess, second-hand smoke, second-in-command, second-rate, secondary colour, secondary consumer, secondary school, secondary ticketing, 返回 secondary