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

It's for 3 or 4 days and it's put on by a local businessman who's a blue grass freak,

它会持续3到4天，是当地的一名商人赞助的，他是个热爱蓝草的怪人，

愉快的音乐庆典 - SpeakingMax英语口语达人

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