自得

Many groups can be added by nucleophilic substitution on a diazonium salt.

许多基团可通过向得自胶的重氮盐作亲核取代而加以导入。

He has been active in describing and interpreting distance education since 1965 for purely academic reasons, first at the Educational Centre inBerlin, then at the German Institute for Distance Education Research and then as Professor of Didactics in Berlin.

自1965年起，彼得斯教授先后在柏林教育中心、德国远程教育研究所工作，1975年至1985年，在德国哈根远程教育大学担任首任副校长，在此之后，他专门从事远程教育研究工作。

Through the comparison with other learning methods, the conclusion is drawn that the Powell method in which the derivative is replaced by the difference quotient is an eff...

通过与其他学习算法的比较，得出结论：其中用差商近似代替导数的Powel法是一种高效、快速的学习方法，其学习速率比带动量项的学习率自适应的BP算法高一个量级，而比DavidenFletcherPowel、BroydenFletcherGoldfarlShanno等变尺度方法以及其他非线性最小二乘法的稳定性要好得多。

One who is accustomed to depravity, on the contrary, always softens things, acts more disgustingly, but with a show of decorum and seemliness by which she claims to be superior to you.

惯于淫荡的人则恰恰相反，总是斯斯文文，干的却是更加卑鄙的坏事，不过表面上却装出一副循规蹈矩、彬彬有礼的样子，自以为比你们高明得多。

"While overall sale volumes have declined across the market, a 5% rise in sold percentages since the beginning of the year, combined with sustained price levels, throughout the period demonstrate that art has continued to hold its value," said Edward Dolman, Chief Executive Officer, Christie's International.

"尽管总成交额比去年同期有所下降，但自今年年初增长了5%的成交率以及稳定的价格皆体现了艺术品的保值性。"佳士得国际首席执行官 Edward Dolman 说道。

Liverpool have a Midlands double-header after Christmas, hosting Wolves on Boxing Day before travelling to Villa just two days later. Although it could be much worse during a congested part of the football calendar, the fixture compilers have been kinder to both United (Hull away on the 26th, Wigan at home on the 28th) and Chelsea (Birmingham away on the 26th, Fulham at home on the 28th). Villa Park has been something of a happy hunting ground for Liverpool in recent years, though. It was 1998 when the Reds last tasted defeat there, after two Collymore goals completed a comeback for the home side who had gone behind to an early Michael Owen penalty. Since then, though, Liverpool are undefeated at Villa's ground, winning six and drawing five of their last 11 visits.

但是利物浦在圣诞节后，有两场重头戏现在节礼日做客狼队，然后两天后飞往维拉，相对于曼联（26号客场胡尔城，主场28号维甘）和切尔西（客场26号伯明翰和28号主场富勒姆），利物浦的赛程要糟糕得多，最近几年维拉公园总是利物浦得分天堂，尽管1998年利物浦1比2在维拉饮恨，当欧文点球首开纪录后，柯利莫尔的两粒进球帮助维拉取得胜利，自那时起，利物浦在维拉未尝败绩，他们在11场做客维拉的比赛中6胜5平。

It is obvious why electronic self publishing has become so popular so fast.

显然自电子出版为什么这么快变得如此受欢迎。

When I do count the clock that tells the time, And see the brave day sunk in hideous night, When I behold the violet past prime, And sable curls all silvered o'er with white: When lofty trees I see barren of leaves, Which erst from heat did canopy the herd And summer's green all girded up in sheaves Borne on the bier with white and bristly beard: Then of thy beauty do I question make That thou among the wastes of time must go, Since sweets and beauties do themselves forsake, And die as fast as they see others grow, And nothing 'gainst Time's scythe can make defence Save breed to brave him, when he takes thee hence.

当我数着壁上报时的自鸣钟，见明媚的白昼坠入狰狞的夜，当我凝望着紫罗兰老了春容，青丝的卷发遍洒着皑皑白雪；当我看见参天的树枝叶尽脱，它不久前曾荫蔽喘息的牛羊；夏天的青翠一束一束地就缚，带着坚挺的白须被升上殓床；于是我不禁为你的朱颜焦虑：终有天你要加入时光的废堆，既然美和芳菲都把自己抛弃，眼看着别人生长自己却枯萎；没什么抵挡得住时光的毒手，除了生育，当他来要把你拘走。

All the inland parts of Africa, and all that part of Asia which lies any considerable way north of the Euxine and Caspian seas, the antient Scythia, the modern Tartary and Siberia, seem in all ages of the world to have been in the same barbarous and uncivilized state in which we find them at present.

值得注意的是，古代埃及人，印度人和中国人都不鼓励对外贸易，他们的富裕似乎都得自内陆航行。非洲内地，黑海和里海以北很远的亚洲地区，古代塞西亚即今日的鞑靼和西伯利亚，似乎一直都处于野蛮和未开化的状态。

University in Evanston, Illinois, USA.

也自美国伊利诺州的西北大学修得新闻学学位。

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。