The line marks a striking difference in the distribution of China's population.
A white line in the street marks the veranda's end.
It seemed such a slender line to mark the boundary between death and safety.
This line marks the limit between the playing ground and the exterior.
All the lines are obscure, but well marked on the costa.
The line marks the most recent highest extent of the glacier.
A thin line of blood from a scratch marked the woman's cheek.
All six lines headed in the general direction of the point marked as the treasure, but none directly.
A line of white shapes in the distance marked still another wagon train.
A line of blue chemical lights marked the way to the landing strip not far away.