double order for traversing tree

例句：

1. 1. The double order wasto deliver the goods by tomorrow morning.
   双重命令是明天早上之前交付货物。
2. 2. Themanager double ordered the staff to clean theoffice thoroughly.
   经理双重命令员工彻底清洁办公室。
3. 3. The double order was for a specialevent, and we had to be readyin advance.
   双重命令是为了一个特殊事件，我们必须提前做好准备。