Parakeets living wild in Britain could be culled because they pose a threat to native wildlife and are damaging food crops.

英国的野生长尾小鹦鹉由于对本土的野生动植物构成威胁并且破坏粮食作物而有可能会被捕杀。

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Not only are illegal enterprises collaborating, but they pose a threat that persists over time, with ability to launch new attacks in the future.

让人担心的不仅仅只是非法的企业式的相互协作，因为具备在将来发起下一轮袭击的能力，所以长久以来他们一直是一个威胁。

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Hundreds of midsize asteroids near Earth are discovered every year, but at this rate, it would take decades to locate all of them and see if they pose a threat.

每年都有数百颗中型小行星在地球附近被发现，但按这一速度，还将需要几十年时间。

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They pose a threat to civilians long after they are dropped as many do not explode immediately.

BBC: Syria conflict: General 'defects to rebels'

Cambridge firm Audio Analytic has produced software which it said can analyse the pitch, tone and intonation of noises and work out if they pose a threat.

BBC: New CCTV technology senses aggression from sound

The government is now considering the introduction of indeterminate sentences for child sex offenders to allow them to be held for as long as they pose a threat.

ECONOMIST: Are there better ways of dealing with sex offenders?