重要中心

Acetate groups charge ZnO nanocrystals negatively and passivate the surfaces,reducing the surface defects and visible emission centers. Resultantly, the increase of acetategroups lead to the quench of visible emission and improvement of photoluminescenceproperties. At appropriate concentrations, the hydroxide groups mainly passivate the surfaceand improve the photoluminescence properties.

研究发现，氢氧化锂/醋酸锌的比值对胶体氧化锌量子点的发光性质有重要影响；醋酸根基团通过使氧化锌粒子带负电荷并钝化其表面，使得氧化锌纳米点的表面缺陷和可见发射中心大大减少，因此醋酸根浓度的增大导致了可见发光的淬灭和发光性质的增强；氢氧根基团在中等浓度时主要起钝化氧化锌表面的作用，使产物的发光性质得到改善。

Belgian local time the morning of October 11,"Chinese New Year - China's fine art collection of folk art exhibition" as the 22nd欧罗巴利亚China Arts Festival, one of the most important items on display in Belgium, la rubia Graphic Arts Center the opening ceremony, Chinese Museum of Fine Arts Fan Di'an represented and made a speech.

比利时当地时间10月11日上午，《中国新年——中国美术馆藏民间美术精品展》作为第22届欧罗巴利亚中国艺术节最重要的展出项目之一在比利时拉鲁维亚版画艺术中心举行了开幕仪式，中国美术馆馆长范迪安作为代表出席并发表讲话。

Belgian local time the morning of October 11,"Chinese New Year -China's fine art collection of folk art exhibition" as the22nd欧罗巴利亚China Arts Festival, one of the most important items ondisplay in Belgium, la rubia Graphic Arts Center the openingceremony, Chinese Museum of Fine Arts Fan Di'an represented andmade a speech.

比利时当地时间10月11日上午，《中国新年——中国美术馆藏民间美术精品展》作为第22届欧罗巴利亚中国艺术节最重要的展出项目之一在比利时拉鲁维亚版画艺术中心举行了开幕仪式，中国美术馆馆长范迪安作为代表出席并发表讲话。

The eighth century was a period of great splendor; Samarkand, as it was now called, became one of the most important cultural centers of the Islamic world.

第八届世纪是一个伟大的时期辉煌；撒马尔罕，因为它现在被称为，成为最重要的一个文化中心的伊斯兰世界。

While SERIC opened its office in Beijing a year ago as part of SERI's globalization effort, its primary role is to help Samsung China operations.

作为全球化战略中的重要一步，SERI在北京开设了三星经济研究院中国研究中心。

"Cyanide is a potent poison and one of the substances that could be used in a chemical attack," said Dr. Steen Galson, Director of FDA's Center for Drug Ealuation and Research."Today's approal is yet another measure to counter the threat of terrorism, which is a critical component of FDA's public health mission."

&氰化物是可被用于进行化学攻击的一种剧毒性物质，&FDA药品评价和研究中心主任史蒂芬·盖尔森博士说，&今天的核准也是对付恐怖威胁的另一措施，这是FDA公共卫生职责中的重要组成部分。&

The key feature for separation of Pallas's is that Pallas's is usually paler/less reddish above and the streaks on the mantle (which may be quite obvious on Middendorff's) are clearly black -centred (reddish/brownish on Middendorff's) and of Styan's is that Styan's is longer-billed and –tailed, plainer and lacks the white leading edge to the outer primary (which is shown by the other two).

分辨小蝗莺的重要特徵是，小蝗莺背面通常较淡/较少红色，以及背羽条纹明显地以黑色为中心的(北蝗莺的是带红色/棕色的)，而史氏蝗莺的特徵是较长的嘴喙及尾部，外侧的初级飞羽较素色且没有白色前缘。

It has derived the widen expansion to the techniquer of forestry and agriculture plant protect department and the national agriculture technology generalizing, total control 130million mu extend to combine economical benefits, biology benefits and social benefits together.

其中，佳多频振式杀虫灯的问世，被中科院院士邱式邦称之为灯光治虫技术的一项重要进展，得到全国农技中心及广大农林植保技术人员的大力推广，累计控害面积1.3亿亩，取得了巨大的经济效益、生态效益和社会效益。

Analytical formulae are presented for the first time to describe the shift in the resonance wavelength of LPG in response to etching of the fiber cladding or a change in the external refractive index. The accuracy of the formula is confirmed by comparision with numerical simulations and experimental results. We demonstrated that the resonance wavelengths of an etched LPG are more sensitive refractive index than those of an unetched grating. The bending properties of long period fiber grating written in different type fiber are studied experimentally. The transmission peaks and the central wavelength of LPG change with the bending of the fiber. A new peak appears at the shorter wavelength when the fiber is being bent. The changes of the peaks are different for different photosensitive fiber. Those properties have broad application foreground in fiber sensors and tunable filters.

分别从理论和实验上对长周期光栅的折射率特性以及光纤包层半径对长周期光栅特性的影响进行了研究，首次给出了描述光纤包层半径腐蚀和外界折射率改变与长周期光栅共振波长关系的理论表达式，实验与理论和数据模拟的结果很好符合，利用腐蚀光纤包层的方法可以有效地提高LPG的折射率灵敏度；对不同光纤中写入的长周期光栅的弯曲特性进行了实验研究，LPG的透射峰形状及其中心波长随光纤弯曲而发生变化，并且随着弯曲将在短波方向出现新的透射峰，其透射峰的变化规律因所用光敏光纤的不同而不同，这一特性在光纤传感和可调谐滤波器方面有重要的应用前景。

Diltiazem is an important coronary vasodilating drug and contains two chiral centers while only the (2S, 3S)-isomer has the desired activity.

地尔硫卓是重要的心血管药物，在其分子结构中含有2个手性中心，可产生4个立体异构体，其中只有(2S， 3S)－异构体具有药理活性，因此其立体选择性合成具有很大的挑战性。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。