今天我们要学的单词是：call off。
这是一个动词 ，表示取消一个项目或计划。
例如：你可以说："Mary called off her wedding after finding out her fiance was still in love with his ex-girlfriend ."（玛瑞在她发现她的未婚夫仍然深爱着他的前女友之后取消了她的婚礼。）
