The anti-collision equipment currently fitted to jets has already helped make mid-air encounters between airliners rare, but many light aircraft and helicopters are not fitted with such kit.

喷气式飞机目前装备的防撞设备已让大型客机的空中碰撞鲜有发生，不过许多轻型飞机和直升飞机并未加载此类设备。

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If pilots keep getting unnecessary alerts, they will tend to ignore them.If an alert is not issued when it should be, however, the result can be a mid-air collision.

如果它不断发出“狼来了”的警告，飞行员将会逐渐无视它的存在，反之，如果紧急关头警报没有及时发出，后果可能是撞机。

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If an alert is not issued when it should be, however, the result can be a mid-air collision.

而如果在必要时未能发出预警，其结果就可能是空中撞机。

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It was blamed on a mid-air collision with a Libyan MiG 23 fighter jet.

BBC: Calls to re-open Libya plane 'crash' investigation

Even before the mid-air collision over the South China Sea caused more turbulence in Beijing-Washington relations, the arms issue was making its own waves.

CENTERFORSECURITYPOLICY: Needed: A Real Commitment to Taiwan

It greatly complicated the mid-air collision between a Chinese fighter and an American spy plane in 2001, which the PLA had (wrongly) blamed on the Americans.

ECONOMIST: Less biding and hiding