a contrary command cancelling or reversing a previous command
cancel officially; "He revoked the ban on smoking"; "lift an embargo"; "vacate a death sentence" 同义词：revoke, annul, lift, reverse, repeal, overturn, rescind, vacate,
例句与用法
1.
The general countermand the orders issued in his absence 将军撤销了他不在时所发布的命令。
2.
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。
3.
One of the advantages of html controls over web controls is that server - side events do not conflict with events that occur on the client , unless the server and client code themselves countermand each other Html控件相对于web控件的优点之一是：服务器端事件不与在客户端发生的事件冲突，除非服务器和客户端的代码本身彼此取消。
4.
This is clearly showed in the two following phenomena : the government departments had been trimed , swollen , trimed again and swollen again . if the power of government is transfer to the low level , there will be disorder , then the central government will countermand the power , which would bring about deadlock 政府改革中存在的机构“精简? ?膨胀? ?再精简? ?再膨胀”和管理权限“一统就死，一放就乱，一乱就收，一收就死”两大怪圈就是其突出表现。
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