切断 cut off; switch off; turn out; key off; key out; shut off; break; cut-out; disconnect 切断敌人后路 cut off the enemy's retreat; 从底部或根部切断 sever at the bottom or root; 通电话时线路被切断 be cut off while talking by telephone; 切断电键 split key; 切断电路 clear the circuit; 切断电源 dump