In 2015, the US Forest Service for the first time spent more than half of its $5.5 billion annual budget fighting fires – nearly double the percentage it spent on such efforts 20 years ago.
2015年，美国林业局首次将其每年55亿美元的预算中超过一半用于扑灭山火——这一比例几乎是20年前的两倍。
Over the past decade, the focus has been on climate change – how the warming of the Earth from greenhouse gases is leading to conditions that worsen fires.
在过去十年中，关注的焦点一直是气候变化——地球因温室气体变暖所导致的条件如何加剧火灾。
At night, scan the horizon for 17 light sources, such as fires and streetlights, then walk toward the glow of light pollution.
在夜晚，在地平线上搜寻 17 个光源，如篝火和路灯，然后朝着光污染的光亮走去。
The fact that fires happened so often meant they couldn't have been severe enough to kill most trees.
火灾频繁发生这一事实意味着它们并未严重到足以杀死大多数树木的程度。
Instead, a growing body of research showed that frequent, low-severity fires made many ecosystems healthier.
相反，越来越多的研究表明，频繁但强度较低的火灾实际上使许多生态系统更加健康。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。