始终有三种灯：红，黄绿。红灯意思是停。

There are always three lights: red, yellow and green. Red means "Stop".

youdao

颜色：红，橘黄，黄，黄绿，绿，兰，紫色，白，灰色和黑。

Colors: Red, Orange, Yellow, GreenYellow, Green, Blue, Purple, White, Gray and Black.

youdao

它的叶子五颜六色，有紫的、有黄的、有橙黄的、还有红的……墙下的草地虽然已经没有春夏时的嫩绿，却好像一块黄绿相间的地毯。

Its colorful leaves, with purple, yellow, orange, and red... Though grass under wall has been no spring, summer, pale green, is like a piece of yellow and green carpet.

youdao

You don't see a red and yellow, you don't see green and blue.

你们不可能看到红连接黄 或者绿连接蓝

耶鲁公开课 - 生物医学工程探索课程节选

Now in a stoplight, it only has three, one is tempted to say, variables plainly differing from each other: red, yellow and green we have two ways of thinking about the red light.

交通灯，三种灯，红黄绿，它们的颜色和彼此不能,我们有两种方式认识红灯的意思。

耶鲁公开课 - 文学理论导论课程节选

One is that there's four different colors and so you can see red, blue, yellow, green here - four different colors and that's all there are, there aren't more than four.

一是这些梯阶有四种不同颜色,你可以看到红 蓝 黄 绿,恰恰只有四种不同颜色,不多不少

耶鲁公开课 - 生物医学工程探索课程节选