The troop spent two years building a log house from Douglas firs they felled themselves.
这支童子军团花了两年时间，用自己砍伐的花旗松建造了一座木屋。
The troop spent two years building a log house from Douglas firs they felled themselves. Mr.
这支童子军团花了两年时间，用自己砍伐的花旗松建造了一座木屋。
On mountain slopes that receive plentiful rainfall, huge Douglas firs rise in towering columns.
在有充足降水的斜坡，巨大的道格拉斯枞树高耸入云。
The site includes many second-growth douglas firs, a beech grove and a grassy meadow with good solar exposure.
场地周围是密集的道格拉斯冷杉，草地茂盛，光照很好。
Our results showed that it is necessary to focus on checking and quarantining wood or woody package from North America, especially douglas firs, ponderosa pines, slash pines and loblolly pines.
分析结果也表明：口岸检疫要重点对来自北美的木材、货物木质包装进行核查和检疫，其中花旗松、西黄松、湿地松、火炬松等更需要重点检疫。
Our results showed that it is necessary to focus on checking and quarantining wood or woody package from North America, especially douglas firs, ponderosa pines, slash pines and loblolly pines.
分析结果也表明：口岸检疫要重点对来自北美的木材、货物木质包装进行核查和检疫，其中花旗松、西黄松、湿地松、火炬松等更需要重点检疫。
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