He was unable to contact Blake by radio.

他未能通过无线电和布莱克取得联系。

《牛津词典》

I've been trying to contact you all day.

我整天一直在设法与你联系。

《牛津词典》

I tried to contact him but was unable to.

我试着跟他联系，却没联系上。

《牛津词典》

They were unable to contact one of the drivers, so the WorldFirst car was barred from the event.

VOA: special.2009.11.03

To be in a state of purity simply means that one is qualified to contact the sacred: to enter the sacred precincts, to handle sacred objects, and so on.

处于纯洁的状态仅仅意味着有资格,去接触神圣，比如说进入圣地的周边地区，打理神圣的物件，等等。

耶鲁公开课 - 旧约导论课程节选

It has to be complex, because we're asking the immune system to be able to respond to every potential foreign pathogen that we come into contact with.

免疫系统是十分复杂的,因为我们需要免疫系统,能够对我们身体接触到的,任何潜在的外来病原体进行反应

耶鲁公开课 - 生物医学工程探索课程节选

She told the court when she tried to contact her again, there was no reply.

BBC: Emily Longley trial: Friend calls defendant 'obsessive'

The BBC has been unable to contact Mr Matak for a response to the claims.

BBC: Leicester

However she advised anyone not feeling better after two to three days to contact their doctor.

BBC: New mothers urged to get swine flu vaccine