Many thanks for your letter of inbitation,but much to my regret, I will not be able to honour it because I have been suffering from an old disease since this summer.

我十分感谢您的邀请信，但十分抱歉的是，我不能出行，因为从今年夏天开始，我的老毛病犯了。

youdao

youdao

In fact, no one dies of old age; "old age" is not a disease, nor is it a cause of mortality.

事实上，没人是因为年老而死亡的，“年老”不是病，也不是导致死亡的原因。

youdao

And the experts say the average age of people found to have the disease is between 20 and 50 years old.

VOA: special.2009.01.06

So people were dying of old age and that was really heart disease that was killing them they just didn't know, so it's multi-factorial and we'll talk about that.

老死的人实际是死于心脏病,只不过人们不知道这一点罢了,这是个多因素的问题,我们以后会进一步探讨

耶鲁公开课 - 生物医学工程探索课程节选

He was forty-nine years old. Leprosy -- also called Hansen's disease is a bacterial disease that causes skin wounds and nerve damage.

VOA: special.2009.10.14

The only good news is that the prognosis for these patients is better than for the old disease.

FORBES: Health

Historically, prostate cancer was considered a disease of old age but a recent study spanning two decades shows that it is becoming increasingly prevalent in younger men.

BBC: Prostate cancer drug 'encouraging'

Although there is no way, yet, to revive dead brain cells, attempts are under way to use old Parkinson's disease drugs that boost levels of the neurotransmitter dopamine or mimic its effects.

FORBES: Twilight Zone