These precautions keep bird-strike fatalities surprisingly rare: in the past 20 years, only 219 people have died in American airspace as a result of bird impacts.

这些防范措施使撞鸟的不幸事件惊人地减少：二十年来，只有219人在美国航空区域死于撞鸟事件。

youdao

To give the to keep your birds to keep squirrels away from your bird feeders, put Vaseline where the where it hangs.

NPR: Vegetable Gardening On A Budget

We have also had a few health scares to keep our minds occupied - the Bird Flu scare, fish (red-tides), beef, and pork.

BBC: In Hong Kong, life goes on

They say they can keep rain from falling on the Bird's Nest Stadium during the opening ceremony - the stadium has no roof - but scientists elsewhere are dubious about that kind of technology.

NPR: Beijing Preps For Opening Of Olympics