两对称

Because the change of grating period caused by the asymmetrical rotation of two beams is limited to 5×10-4 nm at a tunability of the Bragg wavelength of ~100 nm, the tilt of grating caused by the rotation of the biprism can be ignorable.

因为在~100 nm范围内两光束的非对称旋转对光栅周期的改变是5×10-4 nm，双棱镜引入的光栅的闪耀可忽略。

Both halves of this delicate bivalve are exactly matched.

这种精美的双壳贝的两扇完全对称。

This point on the quay is not very far distant from the house brought to Paris from Moret in 1824, by Colonel Brack, and designated as "the house of Francois I."

当他们各自都在进行无可指责的战略时，两人走到了一个通往河滩的斜坡，当时从巴喜来的马车夫可以从这斜坡到河边饮马。为了整齐对称，这个斜坡后来被整修不存在了。

The integration of two inductors and one transformer for asymmetrical half bridge current doubler rectifier converter is introduced in this paper .

中文摘要：本文结合不对称半桥倍流整流变换器，介绍了两个电感与一个变压器的集成。

In Chapter 5, the least-squares solutions bisymmetric matrix set of the matrix equation ATXA = B on two linear manifolds Si ={X BSRnxn\\\XY - Z\\ = min} and S2 ={X BSRnXn\XY = Z, YtTZi = ZjYu ZtffYi = Zi,i = 1,2, Y, Z e Rnxm}, by applying the singular value decomposition of matrix and the canonical correlation decomposition of matrix pairs, we obtain a general expression of the least-squares solutions of the matrix equation ATXA = B on two linear manifolds.

在第五章，我们研究了两类线性流形S_1={X∈BSR~|‖XY-Z‖=min}和S_2={X∈BSR~|XY=Z，Y_i~TZ_i=Z_i~TY_i，Z_iY_i+Y_i=Z_i，i=1，2，Y，Z∈R~}上矩阵方程A~TXA=B的双对称最小二乘解。

Many of the old buildings, one built in the Jailing, known as the Cuban Five in front of the residential areas, it then symmetrical, Ma Tao amongst the wall, commonly known as Wu-yew overturned, just like carvings stone wall is embedded window wall with a pointed plastic jump another from the fish and dragon, Liyudiaolongmen's ruling has sunk; gatepost on the activities of those two big lion, it will be all the best; A door wall Capon each decorated with five fluttering bat, a symbol of the Five quick succession.

众多的古建筑中，有一座建于嘉庆年间名为五福临门的古民居，它那左右对称、高耸入云的马头墙，俗称五岳朝天，墙面嵌着雕花石窗，墙尖塑着冲天而起的跃鱼和飞龙，寓含鲤鱼跳龙门之意；门柱上那两只活动的倒挂狮子，则表示事事如意；门墙上一对瓷盆中各饰有五只飞舞的蝙蝠，象征着五福临门。

It was pointed out that introduction of cyano group into chain of the energetic binder could improve mechanical properties of solid propellant with it.

分析了3，3 双取代氧丁环上两个取代基的类型对其均聚物聚集态的影响，认为在3，3 位进行不对称取代可获得液态含能粘合剂。

AIM: To synthesize 2 novel chiral ligands derived from cinchona alkaloids and study their catalytic performance in asymmetric dihydroxylation of 5 olefins.

目的：合成两种新的金鸡纳生物碱类衍生物配体并将其用于催化五种烯烃的不对称二羟化反应，考察催化效果。

METHODS: Inexpensive quinine and cinchonine were transformed to 9NH2quinine and 9NH2cinchonine, which reacted with 4chlorobenzoyl chloride to afford 2 novel chiral ligands. The AD reactions of olefins were performed in H2OtBuOH (1∶1) using the 2 ligandsK2OSO24 as catalysts.

以价廉易得的奎宁和辛可宁为原料，经过结构转换得到9氨基奎宁和9氨基辛克宁，进而与对氯苯甲酰氯反应制得两种新型手性配体，并将其用于锇催化的烯烃的不对称双羟化反应。

Core adjusting rolling bearing type 22300 has 2rows of symmetry rolling spherical and copper alloy suppting frame,there is no fixed circlip in inner circle,the roller is the longer type,it has the abillity to support more load,the circlip will lead while moving,it has the better performance of core adjusting,also it can compensate the tolerance of coaxiai degree.

调心滚子轴承22300CA型具有两列对称球面滚子和铜合金实体保持架，内圈无固定挡边，滚子加长，承载能力大，活动中挡圈由内圈引导，调心性能良好，能补尝同轴度误差。

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％。