bull-roarer牛: cattle; ox吼: roar; howl器: implement; utensil; ware牛吼河: niuhou he公牛吼叫: bellow下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:牛吼器，即可在微信中查询翻译
