Mills start with a hard, strong construction grade wood like Douglas fir, and then preservative chemicals are injected under pressure to limit the effects of insect and rot damage.
米尔斯开始用硬，强固的构造像花旗松级木材，然后防腐剂化学品的压力之下，以限制昆虫和腐烂造成的损害减少注射。
The corrugated plastic and metal upper sits on top of platform covered in rough-sawn Douglas wood boards.
波纹塑料和平台上的金属座位覆盖了深灰色粗锯的木板。
A reading alcove with a bench of wood slats is lined with Douglas fir panels and stainless steel shelves for display of the owner's photography collection.
阅读间有木条长椅，内衬的花旗松木板和不锈钢架用于陈列主人的摄影收藏品。
They are supported every two meters by thick Douglas pine wood battens -outdoor resistant tree specie -.
它们由每隔两米的厚道格拉斯松木压条所支撑——一种户外的耐抗树种。
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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