相关单词同义词primarily, soon, initially, rather, threshold, conception, beginning, opening, title, elementary, premier, fundamental, basic, essential, 近义词adv. foremost, primarily adj. basic, chief, earliest, primary反义词adv. & adj.last临近词firstly, firmware, firsts, Firstov, firstaid, firstrun, first in, Firstman, first go, first set, first off, first row相似词firm sth up, firmly, firmness, firmware, first aid, first aid kit, first among equals idiom, first and foremost idiom, 返回 first