主根

Needle valves are non-compensating devices the orifice sige will regu late the flow through the valve in proportion to the sgure root of the pressure differential across port 1 and 2,therefore naking these valves suitable only where the load remains constant.

依赖它们在回路中的位置可作量入，量出，旁伸控制。●孔口流量正比压降平主根因此只适合固定负载，变动负载要用压力补偿阀。

Populus growth to a high degree of salinity in the soil, due to the Populus cells permeable than the average plant strong, and from the main root and lateral roots, trunk, bark and leaves to be able to absorb a lot of salt, and through the stems and leaves The excretion of salt gland secretion, when the accumulation of too much salt in the body, it can scar from the trunk section of the gap and will be automatically excretion of excess salt out to form a block of white or yellow crystal,"Populus Tears", commonly known as "Populus base."

胡杨能生长在高度盐渍化的土壤上，原因是胡杨的细胞透水性较一般植物强，它从主根、侧根、躯干、树皮到叶片都能吸收很多的盐分，并能通过茎叶的泌腺排泄盐分，当体内盐分积累过多时，它便能从树干的节疤和裂口处将多余的盐分自动排泄出去，形成白色或淡黄色的块状结晶，称&胡杨泪&，俗称&胡杨碱&。

A methodology of maize radicle for bioassaying chlorsulfur on in soil was studied from indicating plant,pre-treating of seeds, cultivating containers,illuminating and time.

作者从指示植物的选用、玉米种子的前处理、培养器皿、加药方式、培养期间的光照处理、培养时间等诸方面对绿磺隆玉米主根长土培生测法进行了研究。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。