查询词典 F.D.

A 3D corner reflector antenna, with dimensions of 1.7 wavelengths, still has too narrow a vertical diagram and is suitable only for very shallow offset parabolas, with F/D of about 1 and more.

一个尺寸为1.7波长的3D角反射器天线，垂直方向图非常狭窄，只适合很浅的偏馈抛物面天线，其F/D大约1或者更多。

It is obvious that 3D corner reflector antenna could be also adjusted for offset parabolas with a lower F/D if the diagram could be widen in vertical plane and narrowed in horizontal plane so that they are approximately equal to each other and at the same time retain all other good characteristics of this antenna.

显然，3D角反射器天线也必须调整才能用于低F/D的偏馈抛物面，如果它的垂直方向图必须宽，水平方向图必须窄，那么垂直和水平两者之间必须大体平衡，而同时要保持天线的其它所有良好特性。

D.f.,D／F=degrees of freedom

自由度。。。 d form 微小型菌落，侏儒型菌落。。

This monument was erected in memory of F.D.

这座碑是为纪念F.D。

This monument was erected in memory of F.D.

这座碑是为纪念F.D。·罗斯福而建立的。

Temporal matters of but fleeting moment- F.D.

暂时的事态-F.D。

His final, straining burst of speed; a strenuous task; your willingness after these six arduous days to remain here- F.D.

他最后的、艰辛的冲刺；艰巨的任务；在这艰辛的六天之后，你们的决心依旧——f·d·罗斯福。

The unprovoked and dastardly attack by Japan on...December 7th- F.D. Roosevelt.

日本在9月7日发起的无缘无故的、卑怯的进攻——f·d·罗斯福。

The falsehood about some fanciful secret treaties- F.D.

关于一些想象中的秘密谈判的谎言-f.d。

The most researches on Riemann boundary value problem are confined to normal type. The Riemann boundary value problem of non-normal type on smooth closed contours first arised in the book [1] written by F.D.

Riemann边值问题的研究大多限于正则型Riemann边值问题，封闭曲线上非正则型Riemann边值问题的研究最早始于F.D。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。