as red as a cherry字面意思红得像樱桃一样，一般是指脸因尴尬、愤怒或身体紧张而极度发红。所以这个as red as a cherry就很好理解了，就是“脸红”的意思。

【例句】
Oh, Mike definitely likes you—he turns red as a cherry every time you're around!
迈克绝对喜欢你——每次你在他身边，他都会脸红。

Sometimes she blushes as red as a cherry.
有时候他的脸一下子就红了。