原因之一是当症状出现时很多人都缓慢地寻求帮助。

One reason is that many people are slow to seek help when symptoms arise.

youdao

当症状出现的时候，你所需要做的最后一件事就是找人帮忙。

By the time symptoms hit, the last thing you'll want to do is run errands.

youdao

这种潜在致命的疾病可以得到很好的治疗，但是当症状不明显时很难确诊。

Good medical treatment is available for the potentially deadly disease, but the condition in milder forms can be difficult to diagnose.

youdao

Again, I'm not expecting you to remember all the details of this but I'm going to show you this-- when you put all these things together, it's called the metabolic syndrome, and I'll show you some data on its impact on health.

同样的,我不要求大家记住这些细节,但我要告诉大家的是,当你把上面这些症状加在一起,这就是代谢综合征的表现,给大家看一些代谢综合征影响健康的数据

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选