if you were in four-dimensional space it would be a triple integral.

1、

certificate of patent of invention of china

中国发明专利证书

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2、

certificate of patent for invention

发明专利证书

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3、

patenting, issue the certificate of patent, register and announced

授予专利权，颁发专利证书，登记和公告

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4、

the certificate of patent right transfer, if any, should also be provided.

有专利权转让证明的，应同时提供证明。

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5、

setting out from pnls~+e and introducing a slow-time scale, we obtain the matrix form for a linear operator.

由微扰的自散焦非线性薛定谔方程出发，引入慢变时间尺度，我们获得矩阵形式的线性算符；

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6、

then, through solving the slow time-scale problem by optimal control theory, the optimal reduced-order reference trajectory is obtained.

然后，应用最优控制理论得出慢时间尺度上的解，并将其作为降维后的最优参考轨迹；

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7、

biological activated carbon filtration and slow sand filtration are used to study the rural potable water treatment.

采用生物活性炭滤-砂慢滤工艺对农村饮水处理进行了试验研究。

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8、

after unremitting endeavors for many years, by 2005, our city has basically solved the difficult problem for rural potable water.

经过多年的不懈努力，到2005年我市已基本解决农村饮水困难的问题，农村饮水的工程重点已经转向饮水安全问题。

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9、

study on preparation of methyl stearate sulfosalt

制备硬脂酸甲酯磺酸盐的研究

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10、

new green technology of synthesis of methyl stearate catalyzed by titanium sulphate

硫酸钛催化合成硬脂酸甲酯绿色新工艺

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11、

study on reaction mechanism for synthesis of superheavy element

超重元素合成反应机制研究

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12、

progress in superheavy-element syntheses with cold-fusion reaction

冷熔合反应合成超重元素的进展

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13、

a superheavy element with 184 neutrons and 114 protons should be relatively stable, if physicists can create it.

如果物理学家可以创造出来的话，拥有184个中子和114个质子的超重元素应是相对稳定的。

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14、

it's be of great urgency to developing recycling nonferrous metals industry energetically

资源短缺制约我国有色金属工业长足发展加大力度发展再生有色金属工业刻不容缓

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15、

the inverse of difference of equality and ratio of equality g-cyclic matrix

等差、等比g-循环矩阵的逆

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16、

why is that difficult to comprehend?

有什么难懂的？

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17、

to them nothing that is familiar appears unaccountable or difficult to comprehend.

在他们看来，凡习见的东西都不是不可解释的，都不是难以理解的。

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18、

the sheer volume of innovation and technology giants tied to silicon valley seems almost difficult to comprehend.

与硅谷有联系的创新和高科技巨头多得让人几乎难以理解。

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19、

it is a little difficult to comprehend for us since its differences of culture in different times, though we can freely use most of them.

尽管我们能自如运用习语，但因不同时期的文化差异，正确理解习语并非易事。

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20、

this is perhaps difficult to comprehend because their essential tools and ingredients are so similar.

或许这难以理解，因为他们的基本工具和配料如此相似。

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