二二二

This article also indicates an important guiding meaning to the work of planning and construction in a scenic spot

提出风景区内旅游设施规模控制和二十二条规划设计原则，它对风景区规划建设工作有重要的指导意义。

The selective response of Holotrichia oblita to different plant volatiles (1) By steam distillation and dichloromethane, in the Y-tube olfactometer bioassay, the crude extract from castor-oil plant leaves was obviously attractive to female and male of Holotrichia oblita than cotton, Abutilon theophrasti Medic, control dichloromethane.

该结果表明，蓖麻叶片粗提物中含有引诱华北大黑鳃金龟的化学物质。(2)华北大黑鳃金龟成虫对8种化合物的嗅觉仪行为反应结果表明，无论对雌虫还是雄虫，肉桂醛、邻苯二甲酸二丁酯、苯酚、香草醛、苯甲醛的诱虫活性显著高于顺-3-己烯醇。

The results of clinical assessment showed that levosimendan was safe and effective which could improve the prognosis of the patients and kept normal blood kinetics. By improving the reported synthetic route, levosimendan was synthesized from acetanilide via eight steps of reaction.

本论文探索了左西孟旦的合成路线，对文献报道的合成工艺进行了合理有效的改进，以乙酰苯胺为原料，最终经Friedel-Crafts反应，羰基α-位溴代，丙二酸二乙酯缩合，水解，脱羧，环合，拆分及重氮化加成等八步反应合成了左西孟旦。

The saturated concentration of glyoxal dihydrazone in acetonitrile solution at pH 1.75 and 20 ℃ was 20.2 mg/L.

在20 ℃、pH 1.75的乙腈溶液中，乙二醛二腙的溶解度为20.2 mg/L。

Four extracting agents for Lanthanides/Actinides separation , dialkyldithiophosphinic acids, were synthesized from PSCl3 and alkyl halide by Grignard reaction, sulfuration and acidification.

以PSCl3和卤代烷为原料，经格氏反应、硫化和酸化合成了用于镧/锕分离的4个萃取剂——二烷基二硫代次膦酸，其结构经NMR，IR和MS表征。

Dihydroxydiphenylsulfone(2,4′-BPS)was prepared by reaction of phenol and H_2SO_4 in o-dichlorobenzene as solvent in the presence of phosphorous acid as catalyst.

以邻二氯苯为溶剂，苯酚、硫酸为原料，通过添加催化剂亚磷酸合成2，4′-二羟基二苯砜(2，4′-BPS)，确定了较好工艺条件：n苯酚∶n100%硫酸=2.2∶1，亚磷酸16g，回流时间8.0h，2，4′-BPS含量为47.42%，粗收率为70.0%，产品为白色的结晶。

An improved chemical method for the determination of the molar substitution degree of hydroxyethyl guar gum has been described.

本文用模型小分子一缩二乙二醇的醚键断裂实验证明了可行性，羟乙基瓜尔胶上的羟乙基链段与过量对甲苯磺酸-乙酸酐在130℃下反应14hr，醚键完全断裂生成酯，并在pH=11条件下煮沸1hr使酯完全水解，转变为乙二醇。

"In Africa, between 2020 and 2060 we are going to see a huge change. Yields could drop by as much as 40 per cent just because of the rise in temperatures," says Hans Herren, president of the Millennium Institute, a Washington DC thinktank .

华盛顿智库「千禧学院」院长赫伦指出：「在非洲，二0二0年至二0六0年间，我们会见证到一重大改变，农产量可能会因温度上升而减少四成。

Dibutyl maleate was prepared from maleic anhydrideand n- butyl alcohol in the presence of tungstophosphoric acid or molybdophosphoric acid .

用顺丁烯二酸酐和正丁醇为原料，分别以磷钨酸和磷钼酸为催化剂，合成了顺丁烯二酸二丁酯。

After the death of Edward III, King Richard II—who was descended from Edward's eldest son, and was thus neither a York nor a Lancaster—ruled for twenty-two years.

去世后，爱德华三世国王理查德二世是谁的后裔爱德华的长子，因此既不是纽约，也不是一个兰开斯特统治的二十二年。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。