三代的

A series of pyridazino[3,2-c]1,2,4-triazoles were synthesized from hydrazides and 3-aryl-6- chloro pyridazine s (3a～3d), which were obtained from substituted benzene and succinic anhydride by Friedel-Crafts reaction, cyclization with hydrazine hydrate, dehydrogenation and chloro-substitution.

以取代苯和丁二酸酐为起始原料，经Friedel-Crafts反应，肼合环，Br2/HOAc氧化脱氢后得到一系列1，6-二氢-3-芳基-6-哒嗪酮(2a～2d)。然后将2a～2d与PCl5在POCl3中回流，得到相应的氯代产物3a～3d，将其与酰肼作用，合环后得到一系列未见报道的哒嗪并[3，2-c]1，2，4-三唑类化合物。所有化合物结构均经元素分析，IR，1HNMR和MS谱得以证实，并对其波谱性质进行了讨论

In order to solve this problem,for three dimensional cone-beam CT,a penalty SART is researched,at the same time,this means combined with ordered subsets is also researched.

为了解决这一问题，针对三维锥束CT情况，研究了一种增加惩罚项的联合代数迭代算法，同时研究了该算法与有序子集结合的方法。

A series of 3,3,6,6 tetramethyl 1,8 dioxo 9 aryl 1,2,3,4,5,6,7,8,9,10 decahydro acridines have been synthesized by the condensation of aromatic aldehydes, 5,5 dimethyl 1,3 cyclohexanedione and ammonium acetate in the presence of triethylbenzylammonium chloride as catalyst in water.

芳醛、5 ，5 二甲基 1，3 环己二酮与醋酸铵在三乙基苄基氯化铵催化下以水作为溶剂反应，生成一系列 3 ，3 ，6，6 四甲基 1，8 二氧代 9 芳基 1，2 ，3 ，4，5 ，6，7，8，9，10 十氢吖啶，与其它溶剂相比，水作为该反应的溶剂具有价格便宜，不易燃和无毒等优点，而且产率较高，产物的结构通过单晶X射线确

In a pot experiment with spring wheat and buckwheat as test crops and with thiophosphric triamide and dicyandiamide as test inhibitors, the transformation, regulation and residual effect of 〓N-labelled urea were studied.

采用〓N标记的尿素，以N-丁基硫代磷酰三胺和双氰胺为供试抑制剂，春小麦和荞麦分别为供试作物进行尿素N转化的调节及其残效盆栽试验。

The bromo-polyethylenegylcol-monomethacrylate was synthesized by two steps. Firstly, methylacrylic acid was esterified with polyethylene glycol (PEG, M=200, 400) to give polyethyleneglycol-monomethacrylate Secondly, treatment of PEG-MA with phosphorus tribromide gave the aim product.

以聚乙二醉（M分别为200，400）和甲基丙烯酸进行单酯化反应，所得单酯再与三溴化磷进行溴化反应合成了一种新的两端具有功能团的不饱和溴化物，即溴代甲基丙烯酸单聚乙二醇酯。

Think, my dear Olympe. If I'd sent somebody or other along to offer you these same three hundred louis on my behalf and on the same terms that I have set out, you would have accepted.

您想，亲爱的奥林普，我本来可以派一个人带着我的条件来代我送上这三百个路易，这样您可能会接受的。

Withdrawal from Iraq said to be in peril as Maliki ousts negotiators 伊总理亲信接掌与美谈判团队 [1]At the "make-or-break" stage of talks with the U.S.

马利基总理在美伊谈判的关键时刻更换其谈判团队，代之以三名他自己的亲密顾问。一些伊拉克官员说，这种人员变动可能会危及撤军协议。

The company has signed three of Mr. Yao's teammates -- Luis Scola, Steve Francis and Bonzi Wells -- piggybacking off the huge fan base the star and his team have in China.

该公司已签下路易斯·斯科拉、史蒂夫·弗朗西斯和邦奇·威尔斯这三位姚明的队友为其代言，以吸引姚明和火箭队在中国的庞大粉丝群。

Yao's teammates -- Luis Scola, Steve Francis and Bonzi Wells -- piggybacking off the huge fan base the star and his team have in China.

弗朗西斯和邦奇？威尔斯这三位姚明的队友为其代言，以吸引姚明和火箭队在中国的庞大粉丝群。

M-Pio's FL350 was designed to look like and to be worn as jewelry. The FL350 came in three colours - Ruby Red, Sapphire Blue and Amethyst Violet.

他所代言的MP3播放器型号为FL350.M-Pio的FL350设计精美，宛如镶满珠宝，有三款颜色――葡萄酒红，宝石蓝，水晶紫罗兰。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。