短语词组短語optimum hollowness 最佳空心度hollowness packing 空心填充hollowness suppository 空心栓劑Hollowness Bleak 空曠蒼涼city hollowness 城市空心化structural hollowness 空心度No Hollowness 沒有空虛Industrial Hollowness 工業空洞 返回 hollowness