But when they see two guys from the South like Cliff Richey and me, one white and one colored, both sharing a room and being close friends, it must do a little good."

VOA: special.2010.02.07

That there are two colors per strut, so what's linking the two backbones together are two colored segments that come from the outside towards the middle, and that the colors occur only in certain combinations, red and green, yellow and blue, that's all you see.

每个梯阶有两个颜色,主链是由,两种不同颜色的片段由外向内连接起来的,这些颜色仅以某种特定方式配对,红连接绿,黄连接蓝,大家都能看到

耶鲁公开课 - 生物医学工程探索课程节选

Where before it was two colored pairs now it's two lettered pairs .

之前用两种成对的颜色表示,现在是用两对字母GCTA表示

耶鲁公开课 - 生物医学工程探索课程节选