森林需要管理，以尽量减少不良干扰的风险和影响，包括野火、空气污染、风暴倒林、入侵品种、害虫、病害和昆虫。
Forests need to be managed so that risks and impacts of unwanted disturbances are minimized, including wildfires, airborne pollution, storm felling, invasive species, pests, diseases and insects.
在沙漠的空气中水汽很少，也没有会干扰星光的地面上的各种光线，所以在沙漠中可以看到更多更亮的星星。
There is no humidity, and usually no terrestrial lights to interfere, so stars seem more numerous and are unusually brilliant.
风扇和空气过滤器是另一个干扰源，因此有的宇航员会戴耳塞，挡住这些持续不断的嗡嗡声。
Fans and air filters add to the distractions, so some astronauts wear ear plugs to block out the constant hum.
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