Because people still go, Roses are red, violets are blue.

因为人们仍然会说，玫瑰是红色的，紫罗兰是蓝色的。

Violet is there in the “roses are red, violets are BLUE” sense, but purple is not.

那么 为啥天上的彩虹看上去有紫色呢。

And secondly, the color violet in the rainbow is the " roses are red, violets are BLUE" violet.

是「玫瑰红，紫罗兰『蓝』」的那种紫， 不是一般紫色，比较接近深蓝。

And what we now tend to call blue, Newton called violet - as in, roses are red, violets are blue.

就是 红玫瑰 紫罗兰 也就是深蓝色他在“七色彩虹”中引入靛色。

Roses are red. Violets, they're blue.

玫瑰是红色的。 紫罗兰，它们是蓝色的。

We sometimes call it " verse" : Roses are red, Violets are blue.

我们有时称它为“诗句”：玫瑰是红色的，紫罗兰是蓝色的。

For example, here's a very simple poem that rhymes: Roses are red, Violets are blue.

例如，有一首非常简单的押韵诗：玫瑰是红色的，紫罗兰是蓝色的。

Mary's said: Roses are red Violets are blue, Sugar is sweet, And so are you.

玛丽说：玫瑰是红色的，紫罗兰是蓝色的，糖是甜的，你也是。

You can have a poem, like Shakespeare's poems or Jeff McQuillan's poems: " Roses are red, violets are blue – the sky is sunny, and so are you." Thank you, I just . . .

你可以有一首诗， 比如莎士比亚的诗或杰夫麦奎伦的诗：“玫瑰是红色的，紫罗兰是蓝色的——天空是晴朗的， 你也是。 ” 谢谢，我只是。 . .

By the way, the form " roses are red, violets are blue" is often used in English to make a joke about something by writing something funny for the last two lines of that particular poem.

顺便说一句， “玫瑰是红色的，紫罗兰是蓝色的” 这种形式在英语中经常被用来开玩笑， 通过为那首特定诗的最后两行写一些有趣的东西来开玩笑。