取消
参考答案1
解析:UCP第三条规定中英文对照版
The expression "on or about" or similar will be interpreted as a stipulation that an event is to occur during a period of five calendar days before until five calendar days after the specified date, both start and end dates included.
"于或约于"或类似措辞将被理解为一项约定，按此约定，某项事件将在所述日期前后各五天内发生，起迄日均包括在内。 （本解析由安宝蓝提供）