成双的

A projection slit is illuminated by a collimated laser beam.The projection slit is projected onto an object to be measured with grazing incidence through a lens.After being reflected by the object,the projection slit is imaged on a detection double slit through another lens.

准直激光束照明的投影狭缝由一个透镜以掠入射角度投影在被测物体上，狭缝投影经过被测物体表面的反射和另一个透镜的成像在探测双缝上形成投影狭缝像。

If the IEEE double-precision significand has more precision than the internal representation it will be rounded to the internal representation using the round to nearest rule.

如果 IEEE 的双精确有效数字比内部表示法有更多的精确度，它将会被用四舍五入到最接近的规则来四舍五入成内部表示法。

Two magnetic triphase catalysts of comb-like polyether s supported by γ-Fe2O3 were synthesized, and their catalytic behaviors in the iodo-substitution, etherization and the addition reaction of dichlo-rocarbene to styrene were also investigated.

以表面经偶联剂修饰的γ-Fe2O3为载体，通过聚分别与乙二醇单甲醚和一缩二乙二醇单甲醚的醇钠盐反应，合成了两种磁性梳状聚醚三相相转移催化剂，研究了它们在碘代、二氯卡宾对双键加成和混合醚制备反应中的催化活性。

Imaging quality of a single mirror and two mirrors in the case of grazing incidence is discussed. The focal length, field obliquity and diaphragm position of KBA microscope are analyzed.

详细分析掠入射情况下单镜及双反射镜的成像特性，对组成KBA显微镜的反射镜在掠入射条件下的焦距、视场倾斜、光阑位置等进行研究。

In the scheme,the key reactions were Grignard reaction, dihydroxylation,S_N2 substitution of hydroxyl and epoxide under acidic conditions and etc.

合成过程中的关键反应为Grignard反应，双羟化反应，质子酸催化的羟基与环氧的S_N2亲核取代成环反应。

Double Branch enterprise was established in July 1998, is specialized in chemical cleaning, environmental engineering, HVAC and 513 works of science and technology-based enterprises operating, the company is located in the Gangnam city - the Changzhou National Hi-tech Development Zone, Shanghai-Nanjing line On the important hub of commerce - the Yangtze River Trade Center 1-15, with a registered capital of 2.1 million yuan, the company employs more than half of a senior title, in Zhengzhou, Wuhan, Shanghai and other places with branches or offices.

双科企业成立于1998年7月，是专门从事化学清洗、环境工程、防腐工程和暖通工程的科技经营型企业，公司坐落于江南名城——常州的国家级高新技术开发区，沪宁线上重要的商贸枢纽——长江贸易中心1-15号，注册资金210万元人民币，公司员工总数一半以上具有中高级职称，在郑州、武汉、上海等地设有分公司或办事处。

The relationship between the reflectivity and the position of stress is hyperbolic tangent. Moreover, the phase had certain relations. Based on this, the characteristic of FBG under inhomogeneous transverse force were studied.

同时，应用传输矩阵的方法对光纤光栅横向局部受力特性进行了研究，研究发现当光栅局部受力时，反射谱产生分裂，分裂点波长移动与受力大小成线性周期变化，分裂点的反射率与光栅局部受力位置为双曲正切关系，而且相位也存在一定的关系。

Next, we study the case when the approximation spaces are the anisotropic linear triangular element and a new conforming triangular Hermite-type one, by taking advantage of a series of new approaches, the convergence analysis of hyperbolic type integro-differential equations is provided, the error estimates are also obtained .

其次，把逼近空间分别取成具有各向异性特征的协调线性三角形元和一个新的二次Hermite型三角形元，针对双曲型积分方程，给出了相应的收敛性分析及其误差估计。

He is too big, they all said, and the turkey cock, who had been born into the world with spurs, and fancied himself really an emperor, puffed*(3) himself out like a vessel in full sail,and flew at*(4) the duckling, and became quite red in the head with passion, so that the poor little thing did not know where to go, and was quite miserable because he was so ugly and laughed at by the whole farmyard.

大家都说。有一只雄吐绶鸡生下来脚上就有距，因此他自以为是一个皇帝。他把自己吹得像一条鼓满了风的帆船，来势汹汹地向他走来，瞪着一双大眼睛，脸上涨得通红。这只可怜的小鸭不知道站在什么地方，或者走到什么地方去好。他觉得非常悲哀，因为自己长得那么丑陋，而且成了全体鸡鸭的一个嘲笑对象。

Lev's features seem to have been "thrown together inattentively, as if in the dark. Even his ears seemed to belong to two completely different people."

列弗的五官看上去"仿佛是于黑暗之中不经意地拼凑而成"，"就连他的双耳都似乎属于两个完全不同的人"。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！