The progress of research in synthesis aminobenzoic acid from different material is presented.总结了不同原料合成对氨基苯甲酸的研究进展,讨论了各种方法的优缺点.The material is cut and glued in place...材料被剪切下来并粘贴到合适位置。Our life on earth is, and ought to be...
The material consisted only of already published, unclassified information.这份材料里只有一些已公开的、非保密性质的信息。This will give your promotional material individuality and style.这会让你的促销品显得个性十足、格调高雅。In its untreated state the carbon fib...
隧道主要通过三迭系、二迭系 紫红色 软质砂岩、泥岩岩层.It passes mainly through the purple -- color soft sandrock and mudstone in Triassic or Dyas Systems.准噶尔盆地西北缘五八区二迭系佳木河组是含火山岩系地层,即火山岩和碎屑岩混积地层.Jiamuhe formation along the northwestern margin of t...
变压器可在两个晶体管之间隔离直流 偏压.The transformer isolates the transistors with regard to d - c bias voltage .正向信号则使它的正向偏压减弱.The positive - going signal subtracts from the forward bias of the lower transistor.当正向偏压足够高时, 扩散电容很容易超过空间电荷压...