反射

The observer is at a great distance compared to the other dimensions of the experiment and the rays are nearly perpendicular to the reflecting surfaces, then the path difference between the two waves (corresponding to r1-r2 in the preceding section) is just twice the thickness d of the air wedge at each point.

如果观察者比起实验装置来讲距离较远而且光线较接近于垂直反射于表面，那么这两光波的光程差(在前面所述的相应部分 r1-r2)就仅仅是空气劈尖在该点处的厚度 d 的两倍。

The Airy function is used to calculate the plasma impedance and the grill-plasma scattering matrix is deduced, then the coupling properties of the HT-7 LHCD MJ launcher are studied with the antenna scattering matrix and the grill-plasma scattering matrix based on the liner coupling theory. The average power reflection coefficient, directivity, power spectrum are obtained for different edge plasma densities and for different phasings between main waveguides.

采用线型耦合理论，用艾黎函数计算了等离子体阻抗，推导出常规波导阵对等离子体的散射矩阵，并利用它和天线自身的散射矩阵研究了HT-7装置低杂波多结波导阵天线的耦合特性；计算了其平均功率反射系数、方向性系数和功率谱与等离子体边缘密度和主波导相位差等参数的关系。

They increase albedo of the Earth and serve as the basis of its global freezing up.

它们增加了地球的反射率，并成为地球全球冰封的基础。

The above takes place in case of simultaneous increase in the albedo and surface temperature.

上述情况在反射率和地表温度同时增加的条件下发生。

In each SFS algorithm,parameters of the source direction and albedo of the surface are required.

在SFS(基于阴影的三维表面重构)各种算法中，都需要光源方向及曲面反射率。

Sky radiance might be influenced by the multiple reflectance between the earth's albedo surface and the atmosphere.

天空亮度可能受到地表与大气之间的多次反射的影响。

The snow and ice albedo plays a key role in the energy balance between the earth and atmosphere.

冰雪反照率在地气能量平衡中起重要作用，其大小取决于两个方面，即冰雪面的反射属性以及大气或天空的状况。

The Earth's albedo varies mainly through varying cloudiness, snow, ice, leaf area and land cover changes.

地球的反射率主要因云的变化、冰、雪和土地覆被状况的改变而变化。

This means that a zonal mean albedo increase of 1% for a 30-day interval is statistically significant at the 95% level.

5%， 这就是说在 30 天间隔纬向平均反射率增加 1%， 95%在水平时统计上是显著的。

The main reflector weighs approximately 125 metric tons so placing it on the alidade requires a large crane.

主反射镜的重量约125吨，所以把它列入照准需要大型起重机。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。