reversing the arrow of time for living organisms is a technological challenge, not a physical impossibility.

1、

时间之矢

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2、

objective to observe the sedative effects of propofol and fentanyl in severe asthma with respirator and the changes of blood pressure ( bp)、 heart rate ( hr)、 oxygen of saturation of blood compared with the traditional use of chlorpromazine and phenergan.

目的观察异丙酚、芬太尼用于接受呼吸机治疗重症哮喘患者的镇静效果，以及在用药期间血压、心率、血氧饱和度的变化，与传统使用氯丙嗪异丙嗪的镇静效果比较，是否具有优越性。

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3、

objective: to observe the effects of pethidine, phenergan and granisetron in the prevention of shivering during operation after epidural anesthesia.

目的：观察哌替啶、非那根、格拉司琼预防硬膜外麻醉期间寒战反应的临床表现。

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4、

the phenothiazines are safe and effective, and promethazine ( phenergan) often is tried first.

吩噻嗪类药物安全有效，通常首选异丙嗪（非那根）。

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5、

phenergan can result in the best antipruritic effect and prolonged analgesic effect.

其中异丙嗪作用最佳，不仅抗瘙痒作用最强，且能延长吗啡的镇痛时间。

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6、

the deep surface layer is an uniformly strained layer, where h+ appears as a free oh-group.

深表面层是一个均匀应变层，其内H~+以自由OH~-基团形式出现。

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7、

according to the principle of molecular spectroscopy, through analyzing, it has concluded that the fluorescence is generated by the transition of lone-pair electrons in – oh group in methanol molecule and the above property of the fluorescent spectrum is determined by electrons transition.

根据分子光谱理论，经分析提出，该荧光是由甲醇分子中-OH基团的孤对电子跃迁产生的，荧光光谱的上述特性由电子的跃迁情况决定。

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8、

the results showed epoxy group in kh-560 joined to chemical reaction in preparation process of polyurethane elastomers to form& oh group and organic siloxane units were introduced to main chain structure of polyurethane with chemical bond.

结果表明，KH-560中环氧基团参与了化学反应生成了&OH，并将有机硅氧烷结构单元以化学键合的方式引入了聚氨酯主链结构中；

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9、

it was found that dilute ccl_4 solution can exclude the influence of some interfering compounds on oh group determination.

通过研究发现，使用CCl4稀溶液可以排除可能产生干扰的化合物对OH基测定的影响。

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10、

h2s adsorbed on bridging hydroxyl group prior to silanol oh group from the adsorption heat.

从H2S在沸石分子筛的桥羟基和硅羟基与H2S相互作用的吸附热可以推断，H2S优先吸附在桥羟基上。

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11、

moreover, by using molecular surface area ( or the number of substituents) and surface area of oh group as descriptors.

并且用分子表面积（或取代基数）加上OH基的表面积，能很好预言其对发光菌的毒性。

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12、

investigation of thermal stability of structural oh group of montmorillonite interlayered with aluminium hydroxyl cations

铝交联蒙皂土结构羟基热稳定性的研究

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13、

determination of phenolic oh group content in distillate coal liquids by ir spectroscopy

用红外光谱法测定煤衍生液体中的酚羟基含量

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14、

4-Dimethylaminopyridine ( DMAP) was prepared by 'one pot' method with 4-cyanopyridine, 2-vinylpyridine and dimethylamine ( DMA).

以4-氰基吡啶、2-乙烯基吡啶和二甲胺为主要原料，一锅法合成了4-二甲氨基吡啶。

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15、

preparation of 4-dimethylaminopyridine ( dmap) and dmap-catalyzed organic reaction

4－二甲氨基吡啶的合成及其催化的有机反应

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16、

synthesis of 4-dimethylaminopyridine& an efficient acylating catalyst

高效酰化催化剂&4-二甲氨基吡啶的合成

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17、

he instructed that a wall be built around the city.

他下令在城的周围筑一道城墙。

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18、

forest around the city, citizen in the forest.

让森林包围城市，让市民走近森林。

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19、

i want to spare some time to get around the city during holiday.

我想利用假期抽时间逛逛市里。

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20、

would you mind showing them around the city wednesday afternoon?

星期三下午你可以带他们参观市区吗？

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