the district occupied entirely by the city of Washington; chosen by George Washington as the site of the capital of the United States and created out of land ceded by Maryland and Virginia
an electric current that flows in one direction steadily
例句
The line AB cuts the line DC at the point E. AB线和DC线在E点相交。
I acknowledged that it might well NOT be DC or NY. 我知道那些地方不一定是纽约市或华盛顿特区。
