求翻译：自西向东依次为是什么意思？

The order from west to east

from west to east were followed by the

From west to east in turn is

From West to East in order to

West of the great wall from the Jiayuguan, East to Liaodong Shan, 8851.8 km, average 6 to 7 meters high, 4 to 5 meters wide. The great miracle of the great wall is the ancient Chinese working people create, is the witness of a long history in China. It is considered a symbol of China.