white fir

1. 'While not as prized as French and Italian truffles, Oregon produces white truffles that grow in the forests under Douglas fir trees. There's no way to farm these truffles.
   虽然美国俄勒冈州出产的松露没有法国或意大利松露那么珍贵，但它是一种生长在森林里道格拉斯冷杉树底下的白松露。
2. The Christmas season has officially arrived at the White House in the form of a six-meter balsam fir tree.
   欢庆圣诞的季节随着一棵6米高的香脂冷杉树的到来已经正式在白宫拉开序幕。
3. Two kinds of waterborne preservatives, Ammoniacal Copper Quaternary ( ACQ) and Copper Triazole ( CuAz), were used to treat Siberian White Fir ( Abies nephrolepis) logs by pressure impregnation.
   采用水溶性铜防腐剂（ACQ）和铜唑类防腐剂（CuAz）加压浸注处理臭冷杉木材，研究了药液处理浓度和后期干燥条件对木材抗弯弹性模量和抗弯强度的影响。
4. The driving signals are generated by filtering a series of independent white noise sequences using finite impulse response ( FIR) filters. The driving signals are updated in every loop until the response spectrums fit the reference ones.
   该方法通过构造一组有限冲击响应（FIR）滤波器对独立的白噪声序列进行线性滤波耦合而直接生成驱动信号，在闭环控制中实时修正驱动信号，使得最终响应谱满足参考谱要求。

noun

1. medium to tall fir of western North America having a conic crown and branches in tiers

   Synonym:    amabilis firPacific silver firred silver firChristmas treeAbies amabilis

2. medium to tall fir of central to western United States having a narrow erect crown and soft wood

   Synonym:    Colorado firCalifornia white firAbies concolorAbies lowiana