A few years ago, the US Forest Service studied trees in Chicago.
几年前，美国林业局在芝加哥研究树木。
Another reason, experts say, is related to the century-long policy of the US Forest Service to stop wildfires as quickly as possible.
专家们表示，另一个原因与美国林业局长达一个世纪的政策有关，即尽快扑灭野火。
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，美国林务局首次使用55亿美元年度预算的一半以上用于灭火——这几乎是20年前火灾支出所占比例的两倍。
Two new studies, led by US Forest Service researchers, took a closer look at urban green space in Philadelphia, Baltimore and Youngstown, Ohio.
美国林务局研究员做的两项最新研究仔细调查了费城、巴尔的摩和俄亥俄州扬斯敦的市区绿化情况。
Made from carbon steel tempered to US Forest Service specifications, the ax and its attachments are precision-built for strength and reliability.
从被调和到美国森林服务规格的碳钢制造，斧头和它的附件对力量和可信度是精密建造的。
Becky worked in a store doing bookkeeping, while John found work driving a truck and also cutting the flammable undergrowth in the forests (" thinning "them) for the US National forest Service.
贝基在一家商店里记账，约翰找到了开卡车的工作，同时为美国国家森林管理局干一份在森林里砍掉易燃矮树丛的工作(让树木变稀疏，也称抚育或间伐)。
Becky worked in a store doing bookkeeping, while John found work driving a truck and also cutting the flammable undergrowth in the forests (" thinning "them) for the US National forest Service.
贝基在一家商店里记账，约翰找到了开卡车的工作，同时为美国国家森林管理局干一份在森林里砍掉易燃矮树丛的工作(让树木变稀疏，也称抚育或间伐)。
应用推荐