The bracing and merging pattern of basal longitudinal veins plays an important role in phylogeny reconstruction within Pterygota.
有翅昆虫翅基纵脉的走向及愈合模式在系统发育重建中占有重要地位。
2
By analysis of the morphological process in longitudinal profile, cross section and river pattern, the law of river course evolution at Yellow river estuary was summarized.
通过分析黄河口河道在纵剖面、横断面、河型等方面的演变过程，总结归纳出黄河口河道的演变规律。
3
The reason for longitudinal bright trace appeared on the hot-rolled strip is analyzed on the basis of its appearance and regular pattern as well as its control method.