black-letter day的意思是倒霉的一天，厄运的一天。
在英文范文中的用法如下：
Title: Black Letter Day
Date: Tuesday, January 29, 2023
Subject: Another Black Letter Day
Hello,
Today was another black letter day for me. I had a series of unfortunate events that left me feeling helpless and defeated. From a late train to a technical issue with my laptop, it seemed like everything that could go wrong did.
It's hard to believe that such a bad day could happen to me, but it did. I'm left wondering what else could go wrong today. It's making me question my luck and whether this is just the start of a long string of bad luck.
However, I'm not giving up hope yet. I know that every cloud has a silver lining, and I'm going to try to find some positives in this situation. I'll focus on learning from my mistakes and using this experience to improve my future planning and preparation.
In the meantime, I'll just try to get through this black letter day and look forward to a better tomorrow. Thankfully, today is only a single event, and I know that tomorrow is another chance to start again.
Hopefully, you can relate to this story and can empathize with my current situation. Take care, and I'll talk to you soon.
Best regards,
[Your Name]
black-letter day的意思是倒霉的一天，耻辱的一天^[1][2]^。
black-letter day是一个英语成语，在传统的英语语法中，black-letter day是黑色幽默的描述，意味着在这一天你会遇到非常尴尬或不幸的事情，你的行为可能会引起负面的后果。它也可以被理解为“倒霉的一天”或者“耻辱的一天”^[2]^。
black-letter day的意思是倒霉的一天，严厉对待的一天^[1][2]^。
black-letter day在英文范文中的用法没有变化，依旧延续了其原始意义，其形式上与一般英文句子结构相符，只是普通表达方式而已^[1][2]^。