难获得的

So far as I am concerned, I am not a person hard to please.

就我而言，我并不是一个很难获得满足的人。

The phase of optical wave can be recovered by the intensity transport equation under the paraxial approximation For the optical system with diffraction limit, it is difficult to get the boundary radical slope of phase and sample in the circular domain boundary when using the intensity transport equation to recover the phase, consequently, we reviewed an algorithm mentioned in the reference ［4］, namely, the equation, computation domain and boundary condition are changed, then the phase is reconstructed by the multigrid method and corrected at last Moreover, the experiment system is set to testify the algorithm, and the recovered phase from the intensity data detected by CCD is compared with the result from phase retrieval algorithm, it is found that the phase reconstruction error can reach 017 λ in the case of non-uniform intensity distribution, as a result, the method is suitable for the phase recovery with low wavefront sensing accuracy.

在傍轴近似条件下，可以利用光强传播方程对畸变波前进行相位恢复。对于衍射受限的光学系统，很难获得相位的边界径向斜率值作为边界条件，此外，要获得精确的圆域边界采样值也并非易事。为了克服上述困难，进一步研究了相位恢复改进方法，即改变了方程的表示形式、计算区域和边界条件，并用多重网格法进行求解获得重构相位，最后再将其修正。为了验证算法的精确性，搭建了实验系统对算法进行实验验证，将由CCD探测的光强分布进行计算得到的相位分布与相位恢复算法的结果进行比较，证明在光强分布非均匀的情况下，该方法恢复的相位均方根误差能够达到017 λ，可以适用于波前传感精度要求不是很高的相位恢复。标签自适应光学相位恢复相位修正光强传播方程 adaptive optics phase retrieval phase correction intensity transport equation

Finkel warns against interpreting this data as an invitation to sit home or play hard to get:"What you want to do is be easy for one person to get and hard for everyone else,which will increase the likelihood of that one person's liking you."

你要做的是让有一位容易获得你，而其它所有人都很难获得，这样会增加那个人对你的喜欢程度

It gets harder still when the only way CS will take an accusation seriously is if the woman making the accusation produces a police report, which makes many false, Western, ethnocentric assumptions including that the rule of law in every country is applied equally regardless of sex, nationality, sexual orientation, ethnicity, class, etc.; the behavior is classified as a crime in every country and the victim would not be deemed guilty (eg, homosexual encounters or drug-related incidents); the police are reliable and a written report can be obtained in a timely manner without excessive effort or expense; and one is culturally and linguistically competent and knowledgeable of a country's crime reporting procedures or can easily find out what they are.

它更难获得的唯一办法时，政务司司长将采取指控严重的是，如果妇女提出指控产生警方报告，这使得许多虚假的，西方的，种族优越感的假设，包括法治，在每个国家都同样适用，不论其性别，国籍，性取向，种族，阶级等；的行为列为犯罪在每个国家和受害者将不被视为犯罪（例如，同性恋遇到或毒品有关的事件），警方是可靠和书面报告可及时没有过多的努力或牺牲，一个是文化和语言能力和知识的一个国家的报案程序，或可以很容易地发现它们是什麼。

The evidence suggests that not only is it nonrandom and parochial, but it is difficult to come by at all.

这种迹象表明，变异不仅是非随机的、范围有限的，而且根本就是很难获得的。

The results point out that the values of kinetic parameters are altered with the addition of Ti and C, which change the crystallization type from difficult nucleation and easy growth pattern to easy nucleation and difficult growth pattern, and this difficult nucleation and easy growth pattern may be the main reason why fine and even microstructure is gained in Ti and C doped alloys.The influences of Nd content, B content, partial substitution of Nd by Pr on the microstructure and magnetic properties have also been researched.

文章从动力学理论的观点揭示了合金显微结构与合金晶化动力学特性之间的关系，指出Ti和C添加改变了Nd9.4Fe79.6B11合金晶相析出时的动力学参量值，使合金晶化时晶相的析出方式由难形核易长大型加热管转变为易形核难长大型，这种易形核而难长大的晶化动力学特征，是Ti和C添加合金获得细小均匀的纳米晶结构的根本原因。

Result］four of 9 patients successfully retained their component at most recent follow up, without ongoing infection (mean 18 months, range 10～25 months).we have not draw the statistically significant factors that related to successful and failure,but the factors such as acute infection, surfacing replacement, immediate debrided after onset of symptoms, and the bacteria sensitive to antibiotic were relate to success.

由于病例数较少，本研究针对可能影响清创成功的因素未能得出有意义的统计学结果，但从结果看：急性感染清创容易成功，而慢性感染则很难获得成功；表皮葡萄球菌成功率较高，金黄色葡萄球菌均失败；表面膝置换成功率较高，而铰链膝置换则难以获得成功；出现症状后应该抓紧时间进行清创，延误的时间越长，成功的可能性越低。

The most difficult medal to get is the medal of honor.

最难获得的勋章是荣誉勋章。

Due to the microscale effect, they depend on the thickness meanwhile varied from different parparation methods.

这些超常的性质是当前微/纳米器件研究的关键参数，但也同时是十分难获得的参数。

Therefore, the research of sea ice had a lot of scientific values and it worthed me doing such a research work.

在所有海冰参数中，冰厚是最难获得的一种参数。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。