撤销支票付款的委托，仅于提示期限满后行之，始为有效。
1·Intimately familiar with the parameters of the droid signal device, Dellso found a way to countermand the deactivate signal, and soon newly minted battle droids began churning out on the fiery world.
由于熟知机器人信号设备的参数，德尔索找到了取消关闭信号的方法。很快，大量新建的战斗机器人出现在这个炽热的星球。
2·Please countermand our order for same.
对上述订单，请取消。
3·I have now to countermand that order, in consequence of the receipting of the letter this morning.
由于今日上午才收到来函，现在只好取消那份订单。