劍橋詞典the hairs on the back of some animals , or the feathers on the back of the neck of some birds , that rise when the animal or bird is frightened or about to fight （某些動(dòng)物、鳥受驚嚇或臨戰(zhàn)時(shí)會(huì)豎起的）頸背部毛，頸羽 習(xí)語(yǔ)make (sb's) hackles rise 返回 hackles