Far below is the dark, turning line of the Colorado River.

VOA: special.2009.10.07

The key line in the society of the Dark Ages appears to be certainly not between monarchy and everybody else, but between nobility and commoners.

黑暗时代的社会中,最重要的主线,显然不是君主阶级和平民们之间,而是贵族和平民之间

耶鲁公开课 - 古希腊历史简介课程节选

After a while, part of the line went dark.

VOA: special.2009.12.17

Finally,all of the line was dark.

VOA: special.2009.12.17