难得

A circumhorizontal fire rainbow arc occurs at a rare confluence of right time and right place for the sun and certain clouds.

环弧状火彩虹出现概率非常低，它是太阳和一些云层在正确的时间和位置出现罕见的交汇，云层中的冰晶体反应光线形成不同可见波谱光，由于该现象十分罕见，人们拍摄的机会也很难得。

The social and economical words in the literature of Dunhuang and Turfan bear the following characteristics: Simultaneity, as most of those literature works has specific composing time, they are valuable "simultaneous materials"; Authenticity, those literature materials are carefully stored in caves or buried deep underground for thousand years or more, so they can exactly display the original language features; Abundance, those literature materials cover most estates, and the total vocabulary is more than 1 million; Highly colloquial, the social and economical literature also bears the characteristic of colloquialness, which can complement with the Dunhuang Bianwen.

作为近代汉语研究语料，敦煌、吐鲁番社会经济文献的价值在于：一、同时代性。文献大多数有确切的写作时间，为难得的&同时资料&。二、真实性。文献或封存于洞窟或者埋藏于地下一千多年，或更久远，能准确无误地反映当时语言的真实面貌。三、丰富性。文献来自各个阶层，文字数量在……百万字以上，能够从一个侧面反映当时的词汇面貌。四、口语性强。与敦煌变文一样，社会经济文献口语性也很突出。

So it has become an urgent problem that how to grasp the chance, exerting the advantages of the areas, obtaining the developed culture and technics, and continuingly perfecting the system of professinal and techniacal education.

如何把握住西部大开发的难得机遇，充分发挥少数民族地区的资源优势，吸收先进文化和技术，促进少数民族地区的均衡发展，进一步完善少数民族地区新的职业技术教育体系已经成为迫在眉睫需要解决的问题。

Financial markets on the global status, a coolheaded analysis of the financial differences between China and the United States.

屠光绍认为，次贷危机提供了难得的借鉴和机会，总体上有利于上海加快推进国际金融中心建设。

This is the chance that you can get it very difficultly.

这是一生难得的机会。

And if you asked me, the only person in this league who is more untradeable than Yao is Dwayne Wade.

如果你问我，这个联盟里有谁比姚明还要难得到的话，他的名字是D。

The fall dream already awoke, advances to early winter's footsteps to urge that the life could not by the endless waiting, in the earthliness bustling place, treat lovingly put the years which has vacated the foolishness, made one move, has light feelings, the leisurely and carefree mood life, was the beauty which the life was carefree and content, was the life should pursue, the happy time, it in front of us, it will not be eccentric, will like apportioning each good person, when your heart listened respectfully to the life sound of sounds of nature, was how difficult to obtain preciously.

秋梦已经醒，迈向初冬的脚步催促，人生不能以漫漫等待，俗世红尘中，含情待放的歲月空出了的痴心，令人動心，拥有有一份淡淡的情愫，过着闲情逸致生活，是人生悠然自得的美好，是生命应该追求的，幸福的光陰，它就在我们面前，它不會偏心，会把爱分給每顆善良的人，当你的心聆听到生命的天籁之音，是多么难得到宝贵。

Gabriella Montez is a rare science department unusual talent then , there be "Einsteinian" title, moreover her to have got many astonishing achievement and have one's heart in the right place.

Gabriella Montez 则是难得的理科奇才，又有&爱因斯坦&的称号，而且她取得了不少惊人的成绩而且心地善良。

For the product 〓, the signal for n=2 is much smaller than that for n=1, which may due to the large steric hindrance by the ethanethiol ligands.

其原因很可能是乙硫醇分子体积比较大，所以金属离子结合第二个乙硫醇时，就有很大的空间位阻，以致比结合第一个乙硫醇要难得多，结果n=1～2之间出现明显的强度突变。

Although New York often imparts a feeling of great forlornness or forsakenness, it seldom seems dead or unresourceful; and you always feel that either by shifting your location ten blocks or by reducing your fortune by five dollars you can experience rejuvenation.

纽约虽说时常给人一种沉重的失落感或被遗弃感，城市却难得显出死气沉沉或一筹莫展的样子，反倒是你总拥有一种希望：越过10条马路搬次家，或是花去5美元，就能重新焕发青春。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。