The results showed that nasal resistance of positive allergen nasal challenge group was significantly higher than normal control group and negative group.

结果示变应原鼻内激发试验阳性者其鼻总阻力明显高于正常对照组和阴性组；

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It's no small challenge for a blog run by a group of ordinary—if ambitious—young people, but the members of Generation O are up to the task.

对于由一群普通——如果有抱负——的年轻人运营的博客来说，这是一个不小的挑战，但 Generation O 的成员会胜任这项任务。

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He says the biggest challenge is jobs the disabled have the lowest employment rate of any minority group in the country.

VOA: special.2009.08.15

The rising power of a militant group called al-Shabab in neighboring Somalia has also added a new security challenge in the region.

VOA: standard.2009.05.01

This group of doctors meets annually to challenge medical autopsies of famous historical figures.

VOA: standard.2010.06.09

Geoff Barton, its head teacher, is part of the legal challenge group and called the downgrading a "fiasco".

BBC: Suffolk drops down secondary schools GCSE league table

She said the IPCC was discussing setting up a "challenge group" of independent people who can scrutinise the work of both the IPCC and the office of the Director of Public Prosecutions (DPP) to keep the families updated about the progress, independence and robustness of the work.

BBC: Hillsborough inquests date set for next week

David Lloyd, from the campaign group Challenge Navitus, believes the proposal is a "bad plan" in the wrong place.

BBC: Navitus Bay wind farm 'to create 1,000 temp jobs'