我可以把我蓝格子布的围裙给你。你把它铺在地上，然后赶快走过去，把那只狗抱起来，放在我的围裙上。

But you need not be at all afraid of him; I will give you my blue checked apron, which you must spread upon the floor, and then boldly seize hold of the dog, and place him upon it.

youdao

我用我的红围巾换了她的蓝围巾。

I swapped my red scarf for her blue one.

《牛津词典》

我弄错了。不是红的那个，是蓝的那个。

I got it wrong. It wasn't the red one but the blue one.

《牛津词典》

So there was one, "Hardly Strictly Bluegrass". I went to that.

我曾经看过一场“蓝草音乐节”表演，

开放的旧金山人们 - SpeakingMax英语口语达人

Now, just to repeat, again I know I've got some math phobics in the audience, let me just slow down a second, all I'm doing here is I'm saying look at this equation of the pink line, look at this equation of the blue line, X is when they cross, i.e., they are equal to each other.

我再重复一遍,我知道你们之中有些人数学不怎么好,我放慢一点说,我是这么解的,看这条粉线的方程,还有这条蓝线的方程,X是二者的交点,也就是说这点两个方程相等

耶鲁公开课 - 博弈论课程节选