难得

ABSTRACT It is very difficult to get exact mathematical models of industrial processes, models used in design procedure of control systems are commonly mathematical models through approximation.

在实际工程应用中通常很难得到被控对象的精确数学模型，在控制系统设计过程中所采用的模型常常是在一定程度上的经过近似化处理的数学模型。

Competition for the Chinese small and medium investors with a rare exchange space.

本次大赛为中国中小投资者提供一个难得的广泛交流的空间。

However, merging is much more difficult.

然而，合并要困难得多。

Neither, indeed, are allowed any choice as to what they will accept; but the clergy, such at least as can be fully confided in, may admissibly and meritoriously make themselves acquainted with the arguments of opponents, in order to answer them, and may, therefore, read heretical books; the laity, not unless by special permission, hard to be obtained.

诚然，对于二者都不许在接受什么这一点上有所选择；但是教士们，至少能予充分信任的教士们，为要答复反对者的论证之故，则得到允许并受到奖励去认识那些反对的论据，因而可以读到异端的著作；至于不以此为业的俗人，除非有特别的许可，就很难得到这种机会了。

Jazz vocalist: BinBin. Bin-Bin, a jazz singer from Chengdu, has a special and charming mezzo-soprano voice. She could bring you back to the old times with her romantic and fragrant jazz live. No matter in a nightclub or a grant concert, Bin-Bin would attracts every audiance with her unique glamour and high-quality performace. She is definitely one of the best female jazz singer in south China.

彬彬，来自成都的爵士女歌手，她有着独特而又迷人的女中音，由她所演绎的爵士现场，浪漫而又温馨，仿佛时光倒流，让人留连忘返，无论是在午夜的俱乐部还是盛大的音乐会，彬彬都以她独特的魅力驾驭着听众的耳朵，给人高质量的现场享受她无疑是南中国难得的爵士女伶。

CIMA is an excellent opportunity, which will be a stage to show our mien. We are ready to meet the challenges and make wonders.

CIMA是一次难得的机遇，也是一个展示自己风采的舞台，我们已经做好了准备，迎接挑战，创造奇迹。

China's embrace of new media also provides a unique opportunity to modernize the industry.

同时，中国与新媒体的亲密接触也为其工业现代化提供了一个难得的契机。

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。

My father always said a word, I think I can begin to read : muddleheaded. everyone should atmosphere of tolerance!

爸爸常说的一句话，我想我可以开始解读：难得糊涂，做人要大气宽容一点！

Then I became interested in ancient figures: Qu Yuan's hopelessness, Li Bai's self-indulgence, Tao Yuan-ming's Utopia and Zheng Ban-qiao's muddleheadedness, all of which became transfiguration of truthfulness and goodness in my heart.

从此我开始对古人感兴趣了：屈原的无可奈何；李白的及时行乐；陶渊明的避世桃源；郑板桥的难得糊涂，都成了我心目中真善美的境界。

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。