I have to know exactly why it is I'm doing a particular job.

我必须确切地知道我为什么做某项工作。

《柯林斯英汉双解大词典》

I know exactly how you feel.

我完全了解你的感受。

youdao

Since we are friends, I know exactly how she feels now.

既然我们是朋友，我完全知道她现在的感受。

youdao

Let us say I want to sell my car but I do not know exactly how much it is worth.

VOA: special.2009.04.12

This will be the definition of the mole as the amount of carbon weighing exactly 12 grams, so I would like to know now how many particles, how many carbons are there in that mole.

摩尔的定义就是,12克的碳的数量，我想知道有多少粒子，一摩尔会有多少碳粒子。

麻省理工公开课 - 固态化学导论课程节选

Uriah Parmelee had an inheritance; at what level he exactly understood it I can't necessarily know, although his letters are extraordinarily rich.

乌利亚遗留下了一些东西,他的理解到达了一定层次,而我没有,尽管他的书信内容很丰富

耶鲁公开课 - 美国内战与重建课程节选

In the last few days I studied the players and I know exactly what they can give in energy.

CNN: SHARE THIS

Liquids and laptop are carried in the same place in my bags every time so when I get to disgorge, I know exactly where they are.

WSJ: Tips to Take the Hassle Out of Travel

"I do bring the fact that I've won some Super Bowls and I know exactly what it took to get there, " he said.

WSJ: Umenyiora signs with 'most talented' Falcons