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The excited-state intramolecular proton transfer tautomerism reaction of 6-methyl-4-hydroxy pyri-midine monomers and dimmers was investigated by the ab initio method with the self-consistent reaction field with Tomas's polarized continuum mode and CIS theories at HF level on the basis of 6-311+G* and 6-31G basis set. By studying the potential energy surface, it was found that the monomer's ground-state proton transfer process together with the excited-state proton transfer process is a molecular system of four energy level, but dimmers were not, which can be used to explain the fact that UV-visible absorption and fluorescence spectra of monomer and dimers all corresponded to quinoid.

采用 ab initio HF理论的组态相关CIS方法和连续溶剂模型PCM，分别在6-311+G*和6-31G水平上研究了6-甲基-4-羟基嘧啶单体及二聚体激发态质子转移的异构化反应；对其反应势能面的研究发现，单体基态和激发态的异构化反应一起可以形成四能级的分子电子体系，而二聚体的却不能，由此解释了单体和二聚体的紫外吸收光谱和荧光发射光谱均对应于酮式构型的原因。

8 Warning signs with the following wording "DANGER RADIATION HAZARD" both in Chinese and English, and the international symbol for radiation shall be posted so as to be visible from all approaches to the barricaded / taped area.

应在接近设置围栏区域的各个方向悬挂明显警告牌，警告牌上应用中英文写上"危险：放射性危险物"，并有国际通用放射性物标志。

Only the external radii is visible on this plate!

只有外部半径是可见的关于这个板！

This is one of the stars visible to us through a radio telescope.

特殊现象这是一颗通过望远镜才可看见的星星。

Infrared ray is a electromagnetic wave,which has the sane nature of radio wave and visible light.

红外线是一种电磁波，具有与无线电波和可见光一样的本质。

Some innate digital palmar branches could be seen at the pedicle of flyback finger flaps in which veins can be stained to black soon after infusion.It indicated that the blood circulation of arteries to capillaries to veins have completed.The radiogram of flaps showed that the overall transmittancy has been decreased and some blood vessels were visible radiologically.

指背逆行皮瓣的蒂部可见有指掌侧固有动脉的分支，灌注后可见皮瓣内静脉即刻充盈黑染，说明实验皮瓣已完成"血液"从动脉-毛细血管-静脉的循环过程，皮瓣X线造像显示整体透光度减低，皮瓣内有血管显影。

A photographic image produced on a radiosensitive surface by radiation other than visible light especially by X-rays or ''.

一摄影图像由对辐射表面敏感的以辐射线而非可见的光（特别以x射线或者γ射线）拍摄生产。

The process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light.

制作x光照片的过程；利用射线而不是可见光在辐射敏感物质表面生成一个图象。

A photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays).

一摄影图像由对辐射表面敏感的以辐射线而非可见的光（特别以x 射线或者γ射线）拍摄生产。

An image produced on a radiosensitive surface, such as a photographic film, by radiation other than visible light, especially by x-rays passed through an object or by photographing a fluoroscopic image.

射线照片非可见光在对辐射敏感的表面上留下的图像，如通过一个物体的x 射线或对一个荧光图像的摄影

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。