双极的

It was the interactional result of electronegative double bond and branched chain with positive induction effect and space steri.

研究发现，加入不同的添加剂使润滑脂的油膜强度、锥入度和滴点产生不同的变化，并对其产生的原因作了机理分析，认为是由于极压抗磨添加剂分子中带负电性的双键和带正诱导效应及空间位阻效应的支链共同作用的结果。

Equipped only with a pair of binoculars and ready to spend long hours waiting in all weathers for a precious glance of a rare bullfinch, Britain's birdwatchers had long been supposed to be lovers of a minority sport.

英国的观鸟者，只配备了一副双筒望远镜，为了看珍稀的红腹灰雀，却乐意在全天候的条件下，等上很长时间。此等功夫只为看上宝贵的一眼。人们早就把他们当作是一项极少数人从事的消遣活动的爱好者。

Exive least-squares solutions, antire?exive least-squares solutions, bisymmetric least-squaressolutions, symmetric and antipersymmetric least-squares solutions, symmetric or-thogonal symmetric least-squares solutions, symmetric orthogonal antisymmetricleast-squares solutions and their optimal approximation to the linear matrix equa-tion AX = B, and solve them successfully. 2. For Problem II, we can convert it to another problem of finding the least-squares solutions with the least norm of a new consistent matrix equation. Onthe base of the solutions of Problem I we can apply the iterative method to get

本文所构造的迭代法的优点在于先利用法方程变换将求矩阵方程的最小二乘解转化为求一个相容矩阵方程的解的问题，再利用迭代法对于任意给定的初始矩阵进行迭代，均可在有限步内迭代出所求问题的一个解；可将问题II转化为求新方程的极小范数解的问题，同样用迭代法求解，从而系统且全面地解决了问题I、II在约束矩阵类如中心对称、中心反对称、自反矩阵、反自反矩阵、双对称、对称次反对称、对称正交对称、对称正交反对称矩阵中的最小二乘解及其最佳逼近问题。

Three, S, M Series Atomic Absorption Spectrometer using a new Echelle optical system, providing unmatched detection limit; unique four-button background deuterium lamp technology, a more accurate calibration results can be as high as 3A background correction ; patent protection Stockdale two-beam technology, has been very high sensitivity and signal to noise ratio; communicate unique background deduction Zeeman graphite furnace technology; unique ELC Long Life graphite tube; GFTV unique visualization technique by graphite furnace

三、 S 、 M 系列原子吸收光谱仪采用全新的中阶梯光栅光学系统，提供无与伦比的检出限；独特的四线氘灯扣背景技术，校正结果更准确，可校正高达3A 的背景；专利保护的 Stockdale 双光束技术，得到极高的灵敏度和信噪比；独特的交流塞曼石墨炉扣背景技术；独特的 ELC 长寿命石墨管；独特的 GFTV 石墨炉可视技术

S, M Series Atomic Absorption Spectrometry in a new Echelle optical system, providing unparalleled detection limit; Four unique background deduction of deuterium lamp technology, the results more accurate calibration can be as high as 3A background correction; Patent protection Stockdale dual-beam technology, are the sensitivity and high signal to noise ratio; unique exchange Zeeman background deduction graphite furnace technology; ELC unique long-life graphite tube; GFTV unique graphite furnace visualization technique

一、 S 、 M 系列原子吸收光谱仪采用全新的中阶梯光栅光学系统，提供无与伦比的检出限；独特的四线氘灯扣背景技术，校正结果更准确，可校正高达3A 的背景；专利保护的 Stockdale 双光束技术，得到极高的灵敏度和信噪比；独特的交流塞曼石墨炉扣背景技术；独特的 ELC 长寿命石墨管；独特的 GFTV 石墨炉可视技术

It's said that Sappho, the Greek female poet who was phraised as"the tenth muse", was good at playing lute, singing and dancing, and was loved by people in her road show on the Balkan Peninsula. Was she frequently dancing trippingly on the beach? Her fine feet stepped on the white silver sand, with blue thin veins appearing underneath her pale skin; and with the cerulean Aegean Sea behind her, waves beating the shore, coming forward and waning backward, helping her to keep time; her tender body looked more delicate on the magnificence background , and then her movements were frozen in the sky.

传说被誉为"第十位缪斯"的希腊女诗人萨福擅长演奏诗琴，且能歌善舞，在巴尔干半岛巡回演出时极受人们喜爱，不禁神往：她是否常翩翩起舞于沙滩之上，纤美的双足踏着洁白的细沙，甚至可以看到那从苍白皮肤下透出的蓝色的细小血管；身后就是蔚蓝的爱琴海，海浪拍打着沙滩，漫过来又退下去，为她打着拍子；她娇小的身体在宏大壮美的背景上更显秀丽，最后永远定格在天空之中。

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And the "three-factor quadratic regression orthogonal rotary method" was adopted to study mixing performance of the mixer,after the machine had been designed and trial-produced. It was showed that the optimum technological parameters for mixing time, block coefficient and rotary speed of the paddle shaft were 180 s, 0.75 and 56 r/min, respectively. At the same time, the remains in the bin was little (0.015%). The effe...

为了提高双轴桨叶混合机的混合性能，采用二次回归正交旋转组合试验，对设计样机进行混合均匀度及机内残留率的试验研究，得出了其工作参数的合理组合：混合时间为180s，充满系数为0.75，桨叶轴转速为56r/min；机内残留量极小(约为0.015%)，满足其作为配合饲料生产，尤其是预混合饲料生产的工艺要求，也为进一步改进设计提供了依据。

S where 3-EtO-SalAPA is the monoanionic Schiff base derived from 3-ethoxysalicylaldehyde and N-(3-aminopropylaziridine and S is C6H5F, C6H5Cl, C6H5Br, C6H5I or o-C6H4Cl2. Their gradual nature of spin-state interconversion is evidenced by the variable-temp. magnetic susceptibility and EPR data. Only a single quadrupole-split doublet is seen in the Moessbauer spectra for all solvates in the temperature range of

本文对五种组成为[Fe(3-EtO-SalAPA)2]ClO4.S的Fe自旋变异晶态配合物进行了磁学和谱学表征，所有溶剂合物的变温磁化率和EPR数据证示它们的自旋态转变性质均属渐变型，在110-300K范围内的Mossbauer谱都只显示单一的四极分裂双峰。

In this paper,some kinds of measurement methods are compared,a new type of sensor formeasuring thickness------" target dish" single-piece capacitance sensor is designed,whichconquered some defects of traditional double parallel board capacitance sensor .

本文通过对各种测厚传感器的比较，针对传统的双平行极板式电容传感器存在的诸多缺点，研制出了一种新型的测厚传感器——镖盘状单片式电容传感器。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷