The demographic statistics show that China has completed the population transformation;

1、

Expert Group on a System of Social and Demographic Statistics

社会和人口统计制度专家小组

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2、

Regional Advisory Service in demographic statistics

人口统计区域咨询服务

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3、

Thermal ablation wear is a key factor in deciding the life of a fire-gun barrel.

热烧蚀磨损是决定速射火炮身管寿命的关键因素.

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4、

As a result, the gun-barrel feels as rigid as if it were cast in concrete.

这样一来, 炮管在你感觉中僵硬得像是被浇铸在水泥里面一样.

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5、

A gun-barrel fouls.

枪管塞住了.

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6、

Rust had eaten out the gun barrel.

枪筒已被锈蚀.

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7、

He gives one knock on the hoop, and another on the barrel.

一会说东, 一会说西.

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8、

The article is from the productive ecological footprint, demographic situation, ten thousand GDP ecological footprint state, ecological pressure index, etc. large angle make a concrete analysis of Qinghai Province ecological current situation of sustainable development.

文章从生产性生态足迹、人口状况、万元GDP生态足迹状况、生态压力指数等多角度具体分析了青海省生态可持续发展的现状。

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9、

The nature and pattern of the system social security for the elderly depend on the political institutions and economic system as well as demographic situation of a country.

一个国家社会养老保障制度的性质及其具体运行模式将取决于这个国家的政治和经济制度、经济发展水平和人口状态。

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10、

Regardless of the demographic situation, thesedebilitating substances are essentially tear the world apart.

这种使人衰弱的物质在本质上摧毁这个世界。

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11、

The rapid economic and social development, demographic situation is changing, especially in urban population size changes more apparent.

在经济与社会飞速发展的同时，人口状况也发生着变化，尤其是城市人口规模的变化更为明显。

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12、

Conventional Doppler vibration measurement methods generally involved complicated frequency or phase demodulation system.

在传统的激光多普勒测振方法中，频移信号的检测通常需要具有比较复杂的频率或相位解调系统。

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13、

A phase demodulation technique in frequency domain based on Wavelet transform is investigated.

研究了小波变换在频域解相技术中的应用。

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14、

A Novel Approach for Phase Demodulation from a Single Fringe Pattern

一种新的单幅条纹图的相位解调方法

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15、

Relative phase demodulation technique in frequency domain in projected grating phase method

投影栅相位法三维检测的频域相对解相技术

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16、

Phase Demodulation from a Single Fringe Pattern Based on Iteration Algorithm

迭代估计法单幅条纹图的相位解调

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17、

An important reformation to the phase demodulation system for specific environment was introduced.

针对特定的环境，对鉴相系统作了重要改进；

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18、

Study on Phase Demodulation Technique Based on Wavelet Transform

基于小波变换的解相技术研究

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19、

Application of an envelope demodulation method based on Hilbert transform to torpedo electromagnetic fuze

基于Hilbert变换的包络解调法在鱼雷电磁引信中的应用

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20、

The Comparison and Application of Envelope Demodulation in Machine Fault Diagnosis

机械故障诊断中常用解调方法的比较及应用

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