短语词组短語cut -off circuit 截止電路fuel cut -off 斷油;停止供油;停油燃料耗盡;斷油開關cutoff frequency 截止頻率cutoff wall 隔水牆；截水牆；齒牆cutoff wavelength 截止波長cutoff grade 邊界品位；最低品位cutoff point 截點；分界點cutoff value 截斷值 返回 cut off