双位置

The best match between the rear shapes and support patterns is suggested. The rear 3-point support pattern of concave primary mirror is computed for its deformation under various working condition and the best support position is found out.

找到了主镜的背部形状与其支撑方式间的最佳配合关系；对双凹形主镜的背部三点支撑方式进行分析计算，找到了它的最优支撑位置。

The symcenter of conoscopic interference pattern is corresponding to vertical incident light and crystal birefractive index is proportional to interference order m. Decimal fraction of interference order m is calculated by the placement of central dark fringe and integer part is ascertained by self-consistent method.

干涉图的对称中心对应于正入射光线，双折射率正比于此点的干涉级m，m的小数部分主要由中央暗条纹的位置决定，m的整数部分由自洽的办法求出。

Decoupling of the electro-hydraulic multivariable position coupling system is designed and experimented using diagonal matrix method.

采用对角矩阵法对电液比例双阀控缸位置耦合控制系统进行解耦设计，并在实验装置中得到了实现。

The conserved regions of rRNA and tRNA genes exhibited higher sequence similarity among plant species. Five primer pairs were designed from the conserved regions distributing in psbA~trnK, psbB~psbH, rpl23~trnI, trnR-ACG~trnN-GUU and trnY-GUA~trnD-GUC, respectively to amplify sequences about 500~600 bp, 800~900 bp, 650~700 bp (350 bp, not legume species), 700~800 bp (400 bp in dicotyledon), and 500~600 bp.

经由上述比对分析后设计出5引子对，位於叶绿体基因体的位置分别为psbA~trnK、psbB~psbH、rpl23~trnI、trnR-ACG~trnN-GUU及trnY-GUA~ trnD-GUC，预期实际应用在其他物种上所能增幅之变异序列长度分别约为500~600 bp、800~900 bp、650~700 bp (豆科以外物种为350 bp)、700~800 bp (双子叶植物为400 bp)及500~600 bp。

After the myth of Orpheus and Eurydice by Ovid. A vertical diptych en Super 8mm materialises the situation of the two characters: on the upper screen Orpheus inhabits the earth; on the lower screen Eurydice is in Hades.

在奥维德的俄耳甫斯和欧律狄刻的神话之后，一段垂直的双折超级8mm 胶片赋予这两个人物新的位置：在萤幕的上方，俄耳甫斯居住在土地上，在萤幕的下方，欧律狄刻居住在冥府。

Any lower and you'll look like you have a double chin.

如果照相机位置较低，你就会显得有双下巴。

This paper referred to simulating the supersonic double cone inlet" s flow field of ramjet pill assisted range projectiles at a variety of working circumstances, pressure contours, density contours and Mach number contours of inlet" s flow field were given When cone combination, relative location of cone core and cowl lip, the pressure of outlet, inflow Mach number and angle were changed, flow field and performance parameters of inlet can be affected. Simultaneity, productive mechanism and inducing factors of the inlet surge were also discussed. Then the best working conditions and the best model of inlet were obtained.

本文对冲压增程弹丸所用发动机的双锥超声速进气道在各种工况条件下的流场进行了数值模拟，给出了进气道流场的等压线图、等密度线图和等马赫线图，从而观察在不同的锥尖角组合、锥芯与外罩唇口的相对位置、出口反压、来流马赫数和攻角时，对进气道流场及性能参数的影响，并探讨喘振现象的产生机理及诱导因素，以便确定最佳的工作状态，得到最优的进气道模型。

With perturbation shifting circumferentially step by step, the subsonic flows around slender bodies of revolution vary gradually in manner of single periodicity,while the supersonic flows vary gradually in manner of double periodicity.

由于临界周向位置的存在，随微小扰动沿周向逐渐移动，细长旋成体大攻角亚音速绕流呈现为"单周期、连续变化"规律，而超音速绕流则呈现为"双周期、连续变化"规律。

Watts Series 709 Double Check Valve may be installed in either a vertical or horizontal position.

美国瓦茨系列709双止回阀可以安装在垂直或水平位置上。

M sequence pseudorandom code is used for encoding the pseudorandom code absolute encoder, double slit technique is used to perform time sharing reading and ROM is used as the coding device.

伪随机码绝对式编码器采用M序列伪随机码作为编码方法，采用双狭缝技术进行分时位置读取，并采用ROM元件进行译码输出。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。