双

It means that the city's spatial expansion has not been supported effectively by the transportation system. The polycentric industrial areas and the annularly distributed population do not match spatially.

具体而言，广州市多中心的产业增长和圈层式的人口分布在空间上不匹配，城市未来钟摆式通勤交通的压力将不断加大，而单中心放射状的"双快"交通系统在解决这一问题上是失效的；另外，"双快"系统不利于外围新城市副中心的建设，相反由于与中心城区的快速联系，有可能将大量的人口留在中心城区边缘，给中心城区带来巨大的服务压力。

THE FIRST TOTAL SYNTHESIS OF TAXAMAIRIN B Taxamairin B, representive of rare naturally-occuring rearrang-ed 9(10→20)-abeo-8, 11, 13-triene diterpenoids, has been firstsynthesized by a eleven-step route in an overall yield of 8.19%,starting from commercially available catechol and 1,3-cyclohexan-dione. The improved Friedel-Crafts annulation, thermodynamicallycontrolled-geminal pairing methylation, the selective oxidation ofallyl group and the selective reduction of the less-hindrancecarbon-carbon double bond are the key steps.

二。美丽红豆杉素B的全合成研究 1，美丽红豆杉素B的首次全合成以价廉，易得的邻苯二酚和1，3-环己二酮为原料，经过改良的Friedel-Crafts烷基化反应，热力学控制的α，β-不饱和酮结构的α一位双烷基化，烯丙位的选择性氧化，以及选择性还原位阻较小的碳碳双键等十一步反应，以8.19％的总收率首次完成了美丽红豆杉素B的全合成。

It was demonstrated that both anthracene and pyrene, especially the former, are bimodally distributed.

结果表明，两者都呈双峰分布，其中蒽的双峰特征尤为典型。

Together they model the structure of DNA as a 2 chain helical, with antiparallel properties and the bases facing inward paired to hold the molecule together.....

他们一起制出反向平行特性，和维繫住＜双股＞分子的朝内配对硷基，＜这种＞DNA双股螺丝的模型。。。。。

The Watson-Crick DNA double-heli-cal structure is a 10-fold C10 residues per turn double helix with antiparallel strands.

沃森，克里克DNA双螺旋- Cal的结构是一个10倍C10残留每转）与反平行双螺旋链。

In addition, the principle of treating calculi on both sides of the upper urinary tract, acute anuria, stag-horn calculi , replacement of the ureter with ileum, perinephric abscess formed on the basis of urinary obstruction by the calculi , excretion of calculi by treatment with medicinal herbs and other proble...

本文报告双侧上尿路结石40例，对其临床情况、手术措施、治疗效果及并发症等均作了阐述和分析；对双侧上尿路结石处理原则、急性尿闭、鹿角状结石、肾部分切除、回肠代输尿管、由于结石梗阻而形成的肾周围脓肿、中药排石等问题作了较充分的讨论。

A new generalized fuzzy hyperbolic model is proposed, which can be seen as the generalization of common fuzzy hyperbolic model. The generalized fuzzy hyperbolic model is proven to be a universal approximator. Two identification algorithms are put forward to identify the model from input/out data.

通过对模糊双曲正切模型的改进，提出一种广义模糊双曲正切模型，证明了此模型可以以任意精度逼近紧集上的连续非线性函数，即此模型具有全局逼近性，并给出其辨识算法。

Sport watch, Swiss-Made automatic movement displaying 6-hour, 30-minute and 60-second subdial, Main dial polished silver-tone hour/minute hands with luminous accents and polished chronograph-seconds sweep hand, Subdials displayed by silver-tone hands, Main dial applied and polished silver-tone luminescent baton markers, White Arabic numbers/indices mark subdials, Red/white numbers and white indices mark outer minute track, Analog date display at 3, Polished silver-tone stainless steel round bezel and case with raised design at case sides, Polished screw-in crown and steel pushers, Stainless steel screw-in 'skeleton' caseback, Sapphire crystal, 200 meters/660 feet water resistant.

运动手表，瑞士制造的自动运动显示6小时，30分钟和60秒的表盘，抛光银主拨号音小时/分钟双手发光口音和抛光计时，秒扫手，Subdials显示的银色色调手，主要应用于拨号和抛光银双色荧光指挥棒标记，白色阿拉伯数字/指数马克subdials，红/白，白指数的数字标记外分钟跟踪，模拟3日期显示，抛光银双色不锈钢圆形边框并设立案件提出了设计方面的情况，抛光螺钉在'在冠和钢铁顶推船，不锈钢螺钉骨架'表壳，蓝宝石水晶，200 meters/660英尺防水。

The Pb-Pb isochron of metamorphic argillite in Shuangqiaoshan Group is 1 490±68 Ma, while the Nd mode ages of Zhanggongshan Group, Shuangqiaoshan Group, Chenglang Group and Xiushui Group are 1.57 Ga, 1.89 Ga, 1.77 Ga, 1.60 Ga,respectively, less than 1.6-1.9 Ga, which suggest that they formed in Middle Proterozoic Subera.

研究结果还显示，双桥山群变质泥质岩的Pb-Pb等时线年龄为（1 490±68）Ma，而障公山群、双桥山群、程浪群和修水群的钕模式年龄分别为1.57 Ga、1.89Ga、1.77Ga和1.60 Ga，均分布在1.5～1.9 Ga之间，表明这些地层的形成年龄应小于1.9 Ga，是中—晚元古代的产物，同时表明扬子古陆南缘存在古元古代的基底。

Before entering the country, I've been told by my Peruvian friends that Chileans are unfriendly. Initially I thought they said it because both countries claim to be the origin of pisco, which happens to be both countries' national drink. Peruvians have also been defeated by Chileans back to their battles in Arica, and I thought what they told me might not be true.

为了这次登山，我买了一双不太便宜的登山鞋，以为到时会事半功倍，健步如飞-谁知我就因而犯了登山的大忌，就是在还未完全适应这双新鞋时就穿了上路，结果下山后十根脚趾痛得寸步难行，一到了终站脱了鞋子后，十根脚趾的指甲都破裂脱落了，令人惨不忍睹。

What would he tell Judith and the children?

他将怎样告诉朱迪丝和孩子们呢？

I this is at that time, the opinion with peacockish true girl is full of in a heart.

这就是当时的我，一个心中布满虚荣的女孩子真实的想法。