查询词典 to have a hard time

In order to study the propagation of partially coherent modified Bessel-Gaussian beams passing through a paraxial ABCD optical system with hard-edge aperture,the approximate analytical propagation equation was derived with the hard-edged aperture function expanded into a finite sum of complex Gaussian functions.

为了对部分相干修正贝塞尔－高斯光束通过有硬边光阑近轴4BCD光学系统的传输进行研究，采用将硬边光阑窗口函数展开为有限个复高斯函数之和的方法，得到了近似的解析传输公式。

For the PUU/BO-g-VER (n-butanol graft VER network)hybrid film, the miscibility between the soft and hard segments in PUU phase was improved byadding the BO-g-VER network into PUU, resulting in remarkable reinforcement effect andgreat improvements of mechanical properties for the films. In the PUU/200-g-VER [Mn: 200,poly graft VER], the 200-g-VER network had considerable compatibility withboth hard segments and soft segments in PUU phase, then good reinforcement effect wasrealized, giving rise to higher tensile strength and elastic module, lower elongation at break ofthe hybrid films.

由于BO-g-VER与PUU硬段具有较好的相容性且促进了PUU软硬段间的微相混合，导致PUU／BO-g-VER hybrid膜的力学性能有较大程度的提高，体现了明显的增强效果。200-g-VER(分子量为200的单官能团聚醚接枝VER)与PUU软硬段均有很好的相容性，因此PUU／200-g-VER hybrid有较好的增强效果，使胶膜的拉伸强度和弹性模量提高，断裂伸长率下降。

We can almost hear the hard ring of steel in technology's hard guttural consonants -- tek.

我们几乎都能听见科技厚重的颚音中那金属震荡之音——te、te。

ZM Series exploding isolation protable cola eletrical drill used for mining is applicable to coal mine where has explosive gas and coal dust,used to drill holes in half-hard and hard coal bed when digging .

ZM系列矿用隔爆领手持式煤电钻适用于具有镁尘爆炸性气体混合物的煤矿井下，在采掘工作面对中硬和硬煤层钻眼之用。

Initially called "hard song", that is, no musical instruments, sitting hard to sing, the latter were gradually developed into a snare drum pedal, hand-held bamboo, made to sing fluently.

最初称其为"硬歌"，即无乐器，坐着硬唱，后逐渐发展为一人脚踏小鼓，手持竹板，顺口编唱。

It took Lottie a week to get a bedroom ready, a week of hard work and hard cash.

珞蒂费了一个礼拜的时间才整理好一间卧室，一个礼拜的辛苦日和辛苦钱。

It would be like calling it a "European hard court" and "American hard court."

这就像把硬地分为欧洲硬地和美国硬地。

You should be very careful while partitioning your hard drive and believe me many people make mistakes when they partition hard disk and lose all of their important data.

你应该小心你的硬盘分割而我相信，许多人当他们犯错误隔墙硬盘、失去所有的重要数据。

It is not hard to diagnose and treat it but it is hard in clinical drug treatment for the sake of more and more resistant bacteria come from the abuse of antibiotics.

其诊断与治疗不难，但由于临床上滥用抗菌素，导致耐药菌株的逐渐增多，给临床药物应用增加了困难。

I am hard of hearing and it is hard to get a decent paying job.

我重听这是很难找到一个体面支付工作。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。