You have no idea how painful.

你根本不知道会有多痛苦。

youdao

How painful this betrayal is for us!

这种背叛对我们来说是多么痛苦！

youdao

It is me who can truly understand how painful you felt at speaking this sentence. And I will enshrine it in my mind forever.

只有我明白你说这句话时内心有多痛，我也把你这句话永远地记在脑海里。

youdao

If your friend does not seem to understand how painful your broken heart is, you may ask her to have a heart.

VOA: special.2010.07.18

It's how quickly, how promptly we can recover from these painful emotions-- in other words, how strong our psychological immune system is.

区别在于他们能够多么迅速，多么快速地从痛苦情绪中恢复过来-,换言之，我们的心理免疫系统有多强。

哈佛公开课 - 幸福课课程节选

We'll talk about what is the right time and how do you find the right time, how do you find the balance between thinking about painful emotions and when does it slide to rumination, which is not always helpful.

我们会谈到什么是合适的时候,如何找到合适的时候，以及如何在,思考痛苦情绪,和让痛苦情绪滑入沉思到平衡，沉思并非总有帮助。

哈佛公开课 - 幸福课课程节选

The question is how painful it will be to adjust to this new paradigm.

CNN: Now, the Sinatra Principle

Johnson still believes in it, but he sorely misjudged how painful it would be.

FORBES: Mission Accomplished: J.C. Penney Was The Most Interesting Retailer of 2012

"I can't tell you how painful it is to lose my sister, " she said.

CNN: Manhunt on for suspect in cop shootings