f region中文什么意思
f层
f区
例句与用法
- The length of the trril - f region sequence of the athyriaceae is between 816 bp and 932 bp . the nucleotide sequences were aligned with about forty insertions or deletions
单叶双盖蔗不是与双盖蔗属形成一个分支，而是与以上三属构成一支，并且与假蹄盖藏属的亲缘关系更近。 - The ionosphere f region is one of the most important region in the ionosphere . the night - time irregularities in this region can affect nearly all - frequency radio waves propagation through them
电离层f区是电离层最主要的区域,尤其是其中的不规则结构,导致几乎所有波段的电磁波产生幅度和相位的闪烁。 - Ionospheric scintillation can be observated frequently in low - latitude of china , so it is very important to know the physical mechanism of night - time f region plasma instability and irregularities in it
我国的低纬地区属于电离层闪烁频繁发生的区域,研究电离层f区中不规则结构的产生、演化、形态及分布规律、对电波的影响等具有很重要的意义。 - Ii . molecular phylogeny in this paper , nucleotide sequences of the chloroplast gene trnl - f region was investigated first in the ferns , the pcr primers were chosen . in the test , 34 species in athyriaceae and 3 outgroup taxa were determined trril - f region sequences
介蔗属d尽口athyrium 、蛾眉蔗属lunathyrium 、假蹄盖蔽属athyriopsis 、单叶双盖蔗diplaziumsubsinuatum组成一支，在两种系统树中均得到100 %的支持率。
百科释义
The F region of the ionosphere is home to the F layer of ionization, also called the Appleton layer, after the English physicist Edward Appleton. As with other ionospheric sectors, 'layer' implies a concentration of plasma, while 'region' is the area that contains the said layer.
详细百科解释
