查询词典 precursor

Important precursor to the advent of cognitive radio that promises better use of radio spectrum.

重要前兆的到来认知无线电的承诺，更好地利用无线电频谱。

The synthesis time was ^11min,and the radiochemical purity of the precursor was over 98%.

产物总合成时间11min，放化产率（90.2 2.5）%，放化纯度＞98%，合成成功率100%。

And the destabilizing , as it were , that you seem to be experiencing in your back is the precursor of reconfiguration .

你所感受到的背部问题其实是「解构」的过程，它是「重构」的前兆。

Nanometer TiO2 thin films were prepared by means of a sol-gel process with [Ti4] as the precursor and characterized by XRD, TG-DTA, TEM and PL spectra. XRD results show that the referentially oriented(101) anatase films were formed.

以钛酸正丁酯[Ti4]为前驱体，采用溶胶-凝胶法制备Tb(上标 3+)和Gd(上标 3+)共掺杂的纳米TiO2发光薄膜，并探讨了Gd(上标 3+)对Tb(上标 3+)的增敏作用机理。

The effects of PEG addition to the precursor solution on the microstructure of the resultant thin films were studied.

涂层的形貌，如孔的大小和孔的分布可以通过聚乙二醇的加入量和分子量来控制。

The reticulocyte is not completely mature red blood cell; it is the precursor of mature erythrocyte.

网织红细胞是尚未完全成熟的红细胞，是成熟红细胞的前体。

When applied in ovule culture media, UDP-rhamnose, precursor of pectic polymer, was able to stimulate significant fiber elongation, while rhamnose was inactive in the same growth assay.

在胚珠体外培养的培养液中添加UDP-鼠李糖能显著速进纤维的伸长，而加入鼠李糖对纤维伸长没有影响。

In Chapter 5,the pyrolysis of substituted six-membered ring model compound 4-methyl pyridine has been investigated.Instead of detail theoretical analysis of the reaction mechanism,the general results have been proposed from the products distribution and the combination of the pyrolysis investigation of its analogous pyridine.The major products are H_2,C_2H_2,C_4H_2,C_3H_3N and HCN,here HCN is not a primary initial product at low extent of decomposition.The mole fraction profiles of products have been obtained from the near threshold ionization.The pyrolysis of 4-methyl pyridine is initiated from the methyl abstraction and hydrogen abstraction procedures which are associated with the understanding of the soot formation and the NOX precursor correspondingly.

主要产物为H_2，C_2H_2，C_4H_2，C_3H_3N和HCN，其中HCN为非低温时的热解产物；通过近阈值电离并导出物种随温度变化的摩尔分数曲线，更详细地定量地描述了产物随温度的变化。4-甲基吡啶热解主要从母体脱甲基和脱氢两个初始反应出发，一种趋势是形成大质量数的苯并或杂环的多环化合物，有助于了解炭黑形成过程中的复杂化学过程；另一趋势是开环生成小的碳氢和腈类物质，实验得出的含氮物质的种类及随温度变化有助于了解NO_x的前驱物质的形成及其变化规律。

The ancient Greeks, for example, treated pain with a tea made by boiling willow leaves and bark, a tea modern scientists now know contains salicin, a precursor of acetylsalicylic acid—aspirin.

例如，古希腊人用柳叶和柳树皮煮成的茶水来止痛。现代科学家已经了解到，这种茶里面含有水杨苷成分，就是乙酰水杨酸——阿司匹林的前身。

In particular, the present invention contemplates that a fabric is formed from a precursor web comprising a spunbond and/or cast scrim, which when subjected to hydroentanglement on an imaging surface (24), an enhanced product is achieved.

特别是，本发明期望织物从包含纺丝粘合和/或粗稀松纱的毛网形成，当在成像表面(24)上受到水力缠绕时，获得更好的产品。

Bob Eckert has been chairman and chief executive of Mattel for eight years.

美泰董事长兼首席执行官鲍勃·埃克尔特在任已8年。

The outlook for honors and disgraces carries on and surpasses the traditional outlook for honors and disgraces theoretically, and carries on and develops the theory of construction of socialist mora...

社会主义荣辱观的提出在理论上是对传统荣辱观的一次继承和超越，是对社会主义道德建设理论的继承和发展，在实践上有利于形成良好的社会风尚。