相关单词近义词 principal 主要的, pivotal 重要的, central 中心的, crucial 决定性的, important 重要的, main 主要的临近词focus, FOB, Focalin, Focalux, focalise, focalize, focal set, focal net, focalizer, focal need, focal area, Focal loci相似词fob, fob sb off, fob sth off on sb, focaccia, focal length, focal point, focal segmental glomerulosclerosis, focus, 返回 focal