两对称

Or they may do so asymmetrically, and give rise to two very different daughters.

干细胞也可进行不对称分裂，产生两个完全不同的子细胞。

But they're asymmetrically placed. One is higher than the other one. This one is actually lower than that one.

不过两个褶皱的位置是不对称的，其中一个比另一个略高一些。

It shows that it is possible to increase the start oscillation length by tailoring magnetic field's amplitude and its period without changing the synchronous condition of the fundamental wave; in the meantime, when there are two or more azimuthally asymmetric space harmonics in the high power broad-band helix TWTtraveling wave tu...

与此同时，对起振长度、初始非同步速度参量随皮尔斯增益参量、空间电荷参量、损耗参量等的变化，以及在超宽带行波管中当存在两个或多个角向非对称空间谐波时，起振长度、初始非同步速度参量随周期永久聚焦磁场的变化进行了研究。优化设计聚焦磁场、电子注和螺旋线慢波系统的参量可以对螺旋线行波管的稳定性分析提供必要的依据。

It shows that it is possible to increase the start oscillation length by tailoring magnetic field's amplitude and its period without changing the synchronous condition of the fundamental wave;in the meantime, when there are two or more azimuthally asymmetric space harmonics in the high power broad-band helix TWT, the influences of the Pierce's gain parameter, space charge parameter, and loss parameter on the start oscillation length and real starting asynchronous velocity parameter are also analyzed.

研究结果表明：改变聚焦磁场的幅值或周期来增加起振长度是可能的，而且不会改变基波的互作用条件。与此同时，对起振长度、初始非同步速度参量随皮尔斯增益参量、空间电荷参量、损耗参量等的变化，以及在超宽带行波管中当存在两个或多个角向非对称空间谐波时，起振长度、初始非同步速度参量随周期永久聚焦磁场的变化进行了研究。

Design Krylov subspace conjugate residual squared algorithm for nonsym-metric linear systems and the improved conjugate residual squared algorithm for distributed parallel computing based on biconjugate residual method algorithm, and give theoretical analysis and comparisons of algorithms for two algorithms.

基于BiCR算法设计了求解非对称线性方程组Krylov子空间平方共轭残差算法和适合分布式并行计算的改进的平方共轭残差算法，并对两种算法进行了理论分析和算法比较，串行和并行数值试验表明所提方法具有较好的收敛速度和并行性能。

To address this problem, a new method of security analysis of QKD protocols is introduced. Based on the equivalence attack model of QKD protocols which is refered to Biham's proving, the protocol is divided into two parts: the body and the attack, then a Petri-net model of BB84 is obtained, and a security analysis is followed.

为了简化量子密码协议的安全性证明以及建立一种通用的证明方法，基于Petri 网提出一种量子密钥分配协议的形式化分析方法，根据Biham 的等效对称化攻击模型，将协议分为主体模型和攻击模型两部分，建立了BB84 协议的Petri 网模型，然后对模型进行安全性分析，分析结果表明， BB84协议是无条件安全的。

Some sea anemones are biradial.

一些海葵是两辐对称的。

A pair of razorsharp incisor tasks jut forward from the lower jaw and grind against two blunter versions in the upper jaw.

象剃刀那样锋利的一对门牙从下颚向前突出，可以与上颚的两颗较粗钝的牙对称嚼食。

To reach the maximum load-carrying capacity, together with axial guidance in the very limited headroom available, SKF designed a cageless polymer track-runner ball bearing with two full-complement, asymmetric sets of stainless steel balls .

为了达到最大承载能力，以及轴向的指导非常有限的空间可用， SKF的设计了一个cageless聚合物跟踪亚军球轴承有两个完整的补充，不对称套不锈钢球。

This thesis set forth the significance of information disclosure on hedging supervising, its development history and percent situation. It considers individually the disclosure function and related optimal hedging based two patters: incomplete contract and compellent information disclosure standard.

本文从信息披露监管的角度研究了企业的套期策略行为，首先全面阐述了套期信息披露在套期监管中的重要性、发展历程与现状，在基于非对称信息的前提下，分别考虑了基于不完全合约和强制性信息披露标准两种方式下的披露作用及相应的最优套期策略。

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％。