This has left scientists struggling to pinpoint exactly what about the rich world is making people sick.
科学家们苦苦探寻富裕为何能致病。
Instead, he said, his team was interested in finding a way of training the immune system without making people sick.
他说他的团队则把兴趣放在寻找一种能对免疫系统进行训练，却不会伤害人体的方法。
The CDC said more seasonal flu viruses were making people sick than would normally be expected for May, and the reasons were not clear.
疾病控制及预防中心专家同时表示，今年五月的致病季节性流感病毒比通常预计的多，其具体原因还不清楚。
I'm hyper sensitive to motion sickness and movement in VR, so we have a lot of knowledge in the team on how to avoid making people sick.
在虚拟现实中我会有会亢奋和敏感的感觉，所以我们有很多的知识在团队上如何避免使玩家生病。
Inflammatory bowel disease is not among them. This has left scientists struggling to pinpoint exactly what about the rich world is making people sick.
(贫困的生活环境是会带来很多疾病，但是炎性肠病并不在其中)。这一现象迫使科学家研究指明到底是什么原因使生活富裕的人们生病。
This image of hairy lozenges cruising through an intestine are Escherichia coli (e. coli, for short), the bacteria now making people sick all over Europe.
这种沿着肠道移动的多毛的菱形物体就是大肠杆菌，现在细菌正使整个欧洲染病。
This image of hairy lozenges cruising through an intestine are Escherichia coli (e. coli, for short), the bacteria now making people sick all over Europe.
这种沿着肠道移动的多毛的菱形物体就是大肠杆菌，现在细菌正使整个欧洲染病。
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