相关单词同义词clearance height, overhead clearance, 近义词 clearance 清除, headway 前进临近词headset, headquarter, headroom of flight, headroom over aisle相似词headphones, headquarter, headquarters, headrest, heads I win, tails you lose idiom, heads or tails? idiom, heads will roll! idiom, heads-up, 返回 headroom