His mother had been sick for three years.

他的母亲已经病了三年了。

youdao

People think I'm sick for having a rat as a pet.

人们认为我养只耗子当宠物是变态。

《牛津词典》

Firstly the healer may try to explain to you that you are sick for a reason.

首先，治疗师会告诉你你的病根何在。

youdao

Or they become sick for only a day or two.

VOA: special.2009.05.26

One, developing ways to understand how humans work better, how human physiology operates, and second, developing new approaches for replacing function in people when they're sick.

一,开发新方法更好的了解身体的运作,以及生理过程是怎样发生的,二,当人机体发生病变时,找到方法替代病变器官的功能

耶鲁公开课 - 生物医学工程探索课程节选

Patricia Farnelli said her five children were sick for months, until the family stopped drinking tap water.

VOA: standard.2010.01.02

The Texas medical examiner's office told CNN the woman had been sick for about a month.

CNN: Second U.S. death linked to swine flu, officials say

The cause of death was not disclosed, but Berthold Albrecht had reportedly been sick for a while.

FORBES: German Billionaire Berthold Albrecht, Heir To Aldi Markets And Trader Joe's, Dead At Age 58

Bonny Jacobs, Jill Biden's mother, had been sick for a long time and was living in a hospice.

CNN: Obama accuses McCain of looking for distractions