美国常用英语俚语:Bad hair day

【句子对照】
I'm having a bad hair day today, so I'm wearing a hat.
我的头发没有梳好，所以我戴了一个帽子。

【关键俚语】
bad hair day (noun phrase)
英：a day when someone's hairstyle doesn't look as good as it could
中：头发不整，心情也好