成双的

Then a hexacyclic-ring system formed as a result of molecular recombination, based on which further dehydrogenation occurred.

然后经过重排又转变成了一个具有碳碳双键的六员环体系，并在此基础上进一步发生脱氢反应。

Methods Glutaric dialdehyde was prepared from benzimidazolium salt and saturated dihalide by the addition-hydrolysis reaction of benzimidazolium salt with Di-Grignard reagent.

方法以苯并咪唑盐和二卤代烷为原料，利用苯并咪唑盐与双Grignard试剂的加成水解反应合成戊二醛。

Results The CT findings of pulmonary distomiasis included:(1)unilateral or bialteral mottling,patchy and nodular shadows with hazy border.

结果 肺吸虫病肺内CT表现包括：(1)单侧或双侧肺野出现斑片状、结节状影，边缘模糊，部位、状态易变，少数病例可见特征表现的&隧道&征；(2)肺门影增大，肺纹理紊乱或病灶呈成簇状窟穴状影；(3)胸腔积液常见，特征表现为交替性胸腔积液和心包积液。

The effect of different factors was investigated and the main process conditions were obtained: addition temperature120~140℃,esterify temperature:160~175℃,n:n=3~4:1mol:mol）,n(DCPD:n =0.6~0.8:1mol:mol）,the amount of catalyst is

双环戊二烯的含量低于80%，研究了各种影响因素，得出主要工艺条件：加成温度为120~140℃，酯化温度为160~175℃，n：n=3~4：1，n：n=0.6~0.8：1，催化剂用量为0.1~0.2%，树脂收率达

Sixty patients with Keratodermia tgtods palmaris progressiva were allocated to treatment group and control group at random, by inject Diprospan injection (mix with Lindocaine 2% injection) into both points bend 0.5～1ml, treatment was performed every 2 weeks, continue 4 times.

60例患者随机分为治疗组与对照组，两组均加入2%利多卡因注射液配成体积比为1：1的混合液，于双曲池穴注射，每侧注入0.5ml～1ml，每2周注射1次，连续4次。

Detailed geology- petrology-mineralogy study shows that late Triassic-early Jurassic granites can be divided into 4 groups: granodiorites, monzonitic-K syenogranites mainly, alkali feldspar-alkali granites and syenite, Middle Jurassic granites is composed of quartz diorites-granodiorites and monzonitic granites, the main rock type includes granodiorites and monzogranites; Early Cretaceous granites include alkali gabbro, alkali granites and granodiorites, and these rocks composed bimodal igneous rock group.

详细的地质-岩石矿物学研究表明，晚三叠-早侏罗世花岗岩可以划分成四种岩石组合，即花岗闪长岩组合、二长花岗岩—正长花岗岩组合、碱长花岗岩—碱性花岗岩组合和正长岩组合，其中以二长花岗岩—正长花岗岩组合为主；中侏罗世花岗岩由石英闪长岩-花岗闪长岩组合和二长花岗岩组合构成，岩石类型以花岗闪长岩和二长花岗岩为主；早白垩世出现了碱性辉长岩、碱性花岗岩和花岗闪长岩，构成双峰式火成岩组合。

The histopathology showed that the tumors were rich in cells arranged in fascicles with bipolar and spindled processes. The nuclei showed minor pleomorphism. A few tumor cells were centered on the vessels with a nuclear-free zone that was characteristic of ependymoma.

病理组织学上肿瘤富于细胞，排列成束状、交织状，细胞胞突细长双极，核异型性小，少数肿瘤细胞围绕血管周围形成室管膜瘤的无核区结构。

Objective To optimize parameters with double spiral computed tomographic angiography for visualization of portal veins.

目的评价双螺旋CT血管造影不同扫描层厚和螺距对门静脉成像质量的影响。

Results Most OECs were bipolar or tripolar, and the purity was estimated to be over 88.7%. The non-OECs cells consists of astrocytes, neurons, oligodendrocytes and fibroblas.

结果 体外培养的新生小鼠嗅鞘细胞主要为双极或三极细胞，其纯度可以达到88.7%以上，污染细胞中有星形胶质细胞、神经元、少突胶质细胞和成纤维细胞。

The accumulative affects of Chronic, psychic and unexhaustive stress are important contributing factors for many main diseases harming human healths.

应激方法：将大鼠成对、立式束缚双后肢于笼内，以引起明显的激怒反应，如粗叫、对峙、扭打和嘶咬等。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！