"老教授坦言苦学英语"是指"the old professor candidly admitted that he had struggled to learn Engpsh."

"坦言"的意思是"to admit candidly or openly","苦学"的意思是"to study hard or with difficulty"。

这个短语的来源可能是在某个上课或者讲座的场景中,老教授坦率地承认自己在学习英语的过程中遇到了困难。

下面是一些英文例句和中文翻译:

"I struggled with math in high school, but eventually I was able to catch up."(我在高中时苦学数学,但最终我成功地追上了。)

"Learning a new language is never easy, but it's worth it in the end."(学习一门新语言永远不容易,但最终值得。)

"She admitted that she had struggled to keep up with the class, but she was determined to improve."(她坦言自己苦学跟上班里的进度,但她决心要提高。)