fir [fə:]

fir的基本解释

n.

枞树, 杉木, 枞木

• A fir is an evergreen tree with needlelike leaves that grows especially in cold areas.
• 冷杉是一种针叶常绿树，尤在寒冷地区生长。

abbr.

[军] Far-Infra-Red, 远红外

fir所属的单词分类

Tree / 树 [134]

wingnut  ·  white ash  ·  tulip-tree  ·  sweetgum  ·  quaking aspen  ·  Lone Pine  ·  honeylocust  ·  choke cherry  ·  black willow  ·  sitka spruce

与fir相关的网络例句 [注：此内容来源于网络，仅供参考]

Bieti lost its habitat continuously in recently decades associated with the extension of rangelands and farmlands, as well as firewood collection etc. The monkey live mainly in primary fir forest and the mixed conifer forest, to evaluate the status of the monkeys' habitat, we employed GIS and RS software to identify the habitat types with five Landsat TM/ETM+ satellite imagery in winter of 1986, 1992, 1997, 2001 and 2006 years respectively. The work resulted in: 1 the size of summer grazing lands, farmlands, and fir forest was 13 100 hm2, 6 400 hm2, and 30 500 hm2 in 2006 respectively; 2 during the past 20 years (1986-2006), the size of fir forest (including primary fir forest and the mixed conifer forest) decreased by 14.6%(5 200 hm2), summer grazing lands and farmlands increased by 47.2%(4 200 hm2) and 14.3％(800 hm2) respectively; and 3, during the past 20 years, the number of firry forest patches increased by 68.4%, the mean size of firry forest patches decreased by 49.3%(from 15.1 to7.6 hm2), the largest patch index of firry forest decreased 54.9%; the patch richness had no change, but the Shannon's diversity index and the Shannon's evenness index increased by 2.7% respectively.

为了评估该物种的栖息地现状和变化情况，我们通过野外调查工作，应用GIS和RS技术，分别解译了1986年、1992年、1997年、2001年和2006年的Landsat TM/ETM+冬季卫星影像，并对解译结果进行了计算和分析，得到了以下西藏种群栖息地的主要结果：1）现有暗针叶林（包括原始针叶林和针阔混交林）面积是30 500 hm2，夏季牧场面积是13 100 hm2，农田面积是6 400 hm2；2）在过去20年间（1986-2006年），暗针叶林面积减少了14.6％（5 200 hm2），夏季牧场面积增加了47.2％（4 200 hm2），农田面积增加了14.3％（800 hm2）；3）在过去20年间，暗针叶林的斑块数量增加了68.4％，平均斑块面积下降了49.3％（从1986年的15.1 hm2下降到2006年的7.6 hm2），最大的斑块指数下降了54.9％；景观丰富度并没有变化，但Shannon多样性指数和Shannon均匀度指数分别增加了2.7％。

Fir -ball ... fir - cone fir cone fir cones ... fire fire fire fire burning body of blasting warnings ...

fir-ball 冷杉球果。。。fir-cone 冷杉球果。。。fire射火解雇炽热体放炮警告。。。

In the fire performance study, the charring rate of side and bottom were ranged from 0.587 to 0.750 mm/min and 0.709 to 0.897 mm/min for China fir glulam, 0.643 to 0.770 mm/min and 0.644 to 0.911 mm/min for Japanese cedar glulam, 0.608 to 0.757 mm/min and 0.614 to 0.817 mm/min for Taiwania glualm, 0.588 to 0.627 mm/min and 0.632 to 0.694 mm/min for Douglas-fir glulam, and 0.530 to 0.568 mm/min and 0.566 to 0.583 mm/min for Southern pine glualm, respectively. The results indicated that the charring rate in all glulam showed a decreasing order in Taiwania＞Japanese cedar ＞China fir ＞Douglas-fir＞Southern pine glulam.

集成材之火灾特性上，炭化速度方面：杉木集成梁侧面之炭化速度为0.587 - 0.750 mm/min；底面之炭化速度为0.709 - 0.897 mm/min；柳杉集成梁侧面之炭化速度为0.643 - 0.770 mm/min；底面之炭化速度为0.644 - 0.911 mm/min；台湾杉集成梁侧面之炭化度为0.608 - 0.757 mm/min；底面之炭化速度为0.614 – 0.817 mm/min；花旗松集成梁侧面之炭化速度为0.588 - 0.627 mm/min；底面之炭化速度为0.632 - 0.694 mm/min；南方松集成梁侧面之炭化速度为0.530 - 0.568 mm/min；底面之炭化速度为0.566 - 0.583 mm/min，有南方松集成材优於花旗松集成材，依序为杉木集成材、柳杉集成材、台湾杉集成材之趋势。

与fir相关的网络解释 [注：此内容来源于网络，仅供参考]

fir：冷杉

与加拿大TOLKO公司长期合作,量大价优!欢迎各界人士前来洽谈!可按照规格定尺加工,有自主进出口权!也欢迎有意向的代理商前来洽谈代理事宜,条件优厚!我司现阶段主营产品为加拿大SPF(云杉(Spruce)松木( Pine)冷杉(Fir))

fir：数字滤波器

数字滤波器是数字信号处理中的重要组成部分.数字滤波器分为有限脉冲响应数字滤波器(FIR)和无限脉冲响应数字滤波器(IIR).介绍了利用窗函数设计FIR滤波器的方法,即根据给定的滤波器技术指标,确定有限长单位脉冲序列,

fir：冷杉木

在埃及, 这树是棕榈树(palm-tree), 象征异教的弥赛亚, 巴力-塔玛(Baal-Tamar); 在罗马, 这树是冷杉木(fir), 象征其弥赛亚, 巴力-贝利(Baal-Berith). 在圣诞前夕人们把称为"圣诞节原木"(Yule Log)的大木放入炉中焚烧,

fir：枞

是美国大陆最清洁之州. 本州每年输出三百多万株圣诞树,数目在50州内列第一位. 蒙大拿州同时也是美国五州不课征消费税(No Sales Tax)其中的一州,所以在本州您可享受各种的购物乐趣. 主要树种为松(Pine)及枞(Fir),木材产量丰富.

fir：abbr. far-infrared ray; 远红外