查询词典 librations

Simulated views of the Moon over one month, demonstrating librations in latitude and longitude.

纬天平动是因为月球的自转轴跟公转平面并不完全垂直导致的。

Simulated views of the Moon over one month, demonstrating librations in latitude and longitude.

经天平动是因为地球不在月亮的轨道的中心，而且月亮公转的速度不象自转速度那么均匀等原因导致的。

Through the research of the formation of the frame, it is found that the tilted frame is more stable than the ordinary one because the tilted column increased its lateral stiffness and thus its displacement and librations are decreased.

研究表明改变框架的几何形状，使外柱略微倾斜的办法可以增加结构的抗侧移刚度，获得较好的稳定性；从而相应地减小侧向荷载引起的位移和振动。

Librations are primarily caused by the Moon's varying orbital speed due to the eccentricity of its orbit: this allows us to see up to about6° more along its perimeter.

振动主要地由月亮所引起正在由于它的轨道的古怪改变轨道的速度：这让我们沿着它的周长见到达大约6°更多。

Rubber is a kind of low conduction material, so it can be an ideal product for reducing librations and noise transfer .It is designed with smooth walls and has no influence on flow speed of medium in tests and never rusts either. Therefore , maintenance is not necessary in valid operation period .

因橡胶属不良传导材料，所以它又是一种良好的降低振动和噪声传递的理想环保产品，该产品设计内壁光滑，经实际测试，对介质的流速，流量无任何影响，并且永不生锈，基本可以免除有效运行期内的维修。

Experimental results show that this technique is very precise and useful, and laser speckle method can be used broadly in nondestructive testing field, such as study on surface coarseness, disfigurement measuring, and tiny librations analyzing etc.

由实验检测结果可知这种技术的精度非常高，可广泛应用于表面粗糙度研究、缺陷检测、微振动分析等无损检测领域。

Comparing kinds of method of filter and arithmetic of FFT, the author select the FIR filter to realize pretreatment of signal and Radix-2 FFT to distill the characters of librations.

通过对各种滤波方法和FFT算法进行比较，本套数据检测和校准处理系统采用FIR滤波对采集到的信号进行预处理，利用基2 FFT算法来提取信号的频率特征。

In addition to creating zone of stability in the Moon's orbit in which to build permanent space habitats, the Lagrange librations points have a unique geometry, such that three of the points form an equilateral triangle and two of those three points form congruent equilateral triangles with the Earth and Moon.

除了在月球轨道上建立稳定区域以便建造永久的太空生活地外，拉格朗日平衡点也具备了独特的几何，像是三点形成等边三角形，或者是有两点能跟地球与月球形成全等的等边三角形。

The out-of-plane librations of a si-micro-cantilever under different amplitude sine-base-excitation are efficiently tested,and the error of measurement repeatability for out-of-plane micro-motions is less than 10 nm.

通过实验对硅微悬臂梁在不同幅值正弦基础激励下的离面振动响应进行了有效测量，且测量重复性误差小于10 nm。

In addition to creating zone of stability in the Moon's orbit in which to build permanent space habitats, the Lagrange librations points have a unique geometry, such that three of the points form an equilateral triangle and two of those three points form congruent equilateral triangles with the Earth and Moon.

此外，可以在月球的轨道创造稳定区域，来建立永久性的太空栖息地。拉格朗日点有一个独特的几何形状，例如有三个点（L3、L4、L5），形成等变三角形。而这三个点中又有两个（L4、L5），和地球月亮构成两个等边三角形。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。