硼

Using a prefabricated porous ferroboron lump, a surface composite layer was made on gray cast iron matrix, with a common casting method.

通过预先制备带有孔隙的硼铁合金预制块，用普通浇注的方法，获得以灰铸铁为基的铸造表面复合材料。

The comparisons ofδ_ with simplified exciton model show that the effective coupling between boron center and individual fluorene arm is relatively strong.

采用简化激子模型来讨论CBTFn的双光子吸收截面值，说明在硼原子中心和芴分支间存在很强的有效电子耦合作用。

However, although marine planktonic foraminiferal boron isotope has great potential to be a proxy for atmospheric pCO2, further studies on calibrations are required.

不过，尽管海洋浮游有孔虫中的硼同位素作为大气二氧化碳浓度的替代指标很具有潜力，但还需要进行更加深入地研究。

In the past several decades,great achievements have been made by the marine foraminiferal boron isotope researches on the following aspects:analytical techniques,offsets between laboratories,isotopic fractionation factor,long-term changes in.

海洋浮游有孔虫中的硼同位素能够反映海水酸碱度的变化，从而为重建大气二氧化碳浓度的变化提供了一种新的手段，有望提供目前极地冰心记录所无法企及的百万年甚至千万年时间尺度上的大气二氧化碳浓度的变化。

In the marine carbonate system, with the seawater pH from the foraminiferal 11B, one has to make an assumption on the other variable to obtain the rest four variables. A series studies found that U/Ca and B/Ca are potential proxies for seawater [CO32-]and [HCO3-], respectively.

在同一个有孔虫样品上进行硼同位素与微量元素的研究，还有一个重要的意义就是它可以不用借助其它参数的假设，就能重建海洋碳酸盐系统和大气二氧化碳浓度变化。

The key intermediate 3-methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods,formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction,and then hydr...

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

The key intermediate 3- methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods, formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction, and then hydrolysis.

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

The results show that magnetite is transformed into hematite, serpentine is decomposed into forsterite at lower temperature(T00℃).

实验表明，硼铁矿在氧化焙烧的过程中，低温时(00℃)矿石中的磁铁矿发生氧化反应生成亦铁矿，蛇纹石分解生成镁橄榄石。

Increasing the supply of B was propitious to enhancing the fruited rate.

在一定范围内增加硼的供给，有利于提高结实率。

The regression equations of B and Zn to the grein yield and the protein content in two fertilities have been set up with orthogonal polynomial regression method in this paper.

利用回归方法建立了两种肥力基础上产量和蛋白质含量硼、锌效应方程。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷