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When a plane is tiled according to Penrose's directions, the ratio of tile A to tile B is the Golden Ratio.

当飞机按彭罗斯平铺的指示，比例的瓷砖瓷砖A至B是黄金比例。

Because of the collective modulation of the periodic dielectric distribution to the incident electromagnetic waves, the directions of the group velocity and the phase velocity can be opposite, a photonic crystal slab can work as a negative refractive-index material.

由于介电函数的周期性分布对入射光的调制作用，使得特定频率区域的入射光在光子晶体中传播时的群速度方向和相速度方向相反，因而使得光子晶体平板表现出负折射特性。

The 0°K relaxed structures of grain boundaries in Cu and its alloys (Cu-Ag, Cu-Bi) were simulated with molecular dynamics method by using a five-parameter potential and constant volume assumption.In these cases, the results showed that the atomic distribution was periodic in the two directions paralled to the grain boundary and it was mirror-symmetric in the direction perpendicular to the boundary.

本文采用五参数对势和固定体积的假定，应用分子动力学方法模拟了零温下纯Cu、Cu-Ag和Cu-Bi合金的晶界弛豫结构，计算结果表明，在上述情况下，原子分布在平行晶界面的两个方向是周期性的，在垂直晶界面的方向是镜面对称的。

The establishment and relaxation processes of the transient gratings, which are formed by two recording 514nm beams with different polarization directions, SS, PP, SP and ±45℃, are investigated. Using the weak absorption of the chromophores at 632. 8nm and the positive dichroism of the chromophores molecules, a kind of bi-photonic transient gratings, owing to the periodic distribution of Trans and Cis isomers, is established first time in azo-dye doped polymeric bulk sample.

实验考察了两束514nm的写入光在不同偏振情况下（SS，PP，SP和±45），在样品中形成的瞬态栅的建立和弛豫情况；利用偶氮生色团在632.8nm波段的微弱吸收和生色团分子的正二向色性，首次在块状偶氮聚合物材料中形成一种基于生色团反式和顺式异构体密度分布的双色光瞬态栅；利用瞬态栅的快速建立和弛豫，考察了其在衍射型全光开关方面的潜在应用。

The strength and Young's modulus in the R-direction,perpendicular to the rift plane,are significantly less than those in other directions.

在与rift面相垂直的方向拉伸时，其强度和弹性模量都明显小于其他方向。

Even if the team goals are clear and accepted by everyone, there may be no team commitment to the group goals or no consensus on the means of achieving those goals: individuals in the team just follow their personal opinions and move in conflicting directions.

即便团队目标清晰并被所有成员接受，仍可能缺少对这一目标的信奉，或者就如何达成目标没有形成统一的思想：个体只是按照他们自己的意愿向着有冲突的方向前进。

At last, some research directions for personalization are presented.

最后对个性化服务技术进一步研究工作的方向进行了展望。

A self-adjusting mechanism is added to the new perturbed system such that the Newton directions of each complementary pairs can be adjusted self-adaptively according to the information of last iterates.

这样，在摄动方程本身建立了一种自调节机制，从而使牛顿方向能够根据上次迭代点的信息在各个互补对之间做出自适应的调整。

"One of the directions we are working in is a flight to Phobos, with Chinese participation, which will bring back some of its soil to Earth," Perminov said."We plan to reach the final stage by the end of 2006, possibly even by the start of the sub-commission's work under Prime Minister Mikhail Fradkov."

"我们工作的一个方向是有中国的参与下飞到火卫一并把上面的土壤取些回到地球来，"波米诺夫说，"我们计划年底我们的谈判进入最后阶段，也许在总理米哈伊尔·弗拉德科夫领导下的分委员会的工作才刚开始。"

Past history tells us that the approach of the end of the year, funds tend to in-house phone-in from all directions, the scramble set off a wave of World War II.

过去的历史告诉我们，今年年底的办法，基金倾向于内部电话从四面八方来的争夺引发了第二次世界大战一波。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。