beet甜菜，beet red并不是甜菜红，而是因窘迫，羞愧而脸红。

【例句】
She was so embarrased she turned beet red.
他窘迫得满脸通红。

His face is beet red, I think because he's embarrassed.
他的脸涨得通红，我想是因为他很尴尬。