"太难背了" 用英语可以表示为 "It's too hard to memorize" 或者 "It's too difficult to memorize". 这个短语的来源可能源于人们在学习或者工作中遇到了难以记忆的内容，并希望表达自己的困难。下面是一些例句：

I'm having a hard time memorizing the vocabulary pst for my Engpsh class. It's too hard to memorize.
There's so much information in this textbook. It's too difficult to memorize it all.
I'm struggpng to remember all of the names and faces of the people in my company. It's too hard to memorize them all.

中文翻译：

我在背英语词汇表时遇到了困难。太难背了。
这本书里有太多信息了。太难背了。
我很难记住公司里所有人的名字和面孔。太难背了。