短语词组短语cut -off circuit 截止电路fuel cut -off 断油;停止供油;停油燃料耗尽;断油开关cutoff frequency 截止频率cutoff wall 隔水墙；截水墙；齿墙cutoff wavelength 截止波长cutoff grade 边界品位；最低品位cutoff point 截点；分界点cutoff value 截断值 返回 cut off