Commonly used cuttage, engraft and layering are progenitive, also can sow.常用扦插.嫁接和压条繁殖, 也可播种.Objects To explore the factors of influencing for the cuttage seedling of Akebia trifoliate.目的探讨影响三叶木通扦插育苗的因素.Cuttage uses soft...
Holand Poland and Colombia are also seeking loans from the program.波兰和哥伦比亚也正在从该项目中寻求贷款.The swift fate of Holand was in all our minds.荷兰的急转直下的结局一直在我们的脑际萦回.She is a excellent landscape painter from Holand.她是个非常优异的荷兰风景画家....
The first organisms that reproduced sexually were free-floating plankton.最早开始有性繁殖的生物是四处漂浮的浮游生物。The fish live on the plankton.这种鱼靠吃浮游生物为生。Plankton is at the bottom of the marine food chain.浮游生物处于海洋食物链的最底层....
A new backfire antenna fed by a bifilar backfire belix is described in this Paper.本文提出一种用双线背射螺旋作馈源的新式背射天线.Loads distort every component of the structure of the Cassegrain antenna system.载荷使卡塞格伦天线结构的每个部分发生变形.The microstri...