他在信中说：“我已经成熟了，我承认要对自己的行为负责。”

"I have matured and I admit responsibility for my actions," he said in the letter.

youdao

他在信中向我们透露他愿意合作。

In his letter he indicated to us (that) he was willing to cooperate.

《牛津词典》

你在信中谈到你可能要移居国外。

You mentioned in your letter that you might be moving abroad.

《牛津词典》

Now this allusion here in this verse epistle to his father is to a passage from the book of Revelation.

在这封给他父亲信里的诗中所含的暗示,是从《启示录》中的一段话来的。

耶鲁公开课 - 弥尔顿课程节选

Why don't we say the same $5 check is included but, in the letter, let's say something different?

同样是5美元股利的支票,但在信中,我们换种方式来说

耶鲁公开课 - 金融市场课程节选

He wrote his son in 1704, he said, "I may die tomorrow, but be sure that you have little pleasure if you fail to follow my example.

他在一七零四年写给他的儿子信中说到,"我可能明天就死了,而如果你不能遵循我的的脚步,你是不会快乐的的

耶鲁公开课 - 欧洲文明课程节选