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These restrictive con d itions can be taken as practical design criteria for avoiding reactor instabilit y and temperature sensitivity in multitubular packed-bed reactors.

这些条件也可以作为避免列管式固定床反应器不稳定性和温度灵敏性的实用设计判据。

It may be from a new special gene which is con-elated with salt-resistance ability of wild jujube with mycorrhizal fungi.

此序列可能来源于一个与菌根酸枣耐盐性相关的特有新基因。

U 2+, Co 2+ and Mn 2+ whose concentrations were 40, 40, 20μg·L -1 respectively could increase the AKP activity significantly in mysis, but higher con...

o2 +在 2 0μg·L-1时明显提高两种酶的活性。而Ni2 +只使两种酶活性降低。鉴于碱性磷酸酶和ATPase与生长发育直接相关，金属离子对对虾幼体生长的影响与对两种酶活性的影响基本一致，因此体内这两种酶活性的高低可作为判别环境因素是否适合对虾幼体生存的指标。

The experimental method and reaction conditions for synthesis of acetals and ketals on more than 40 catalysts such as solid superacids、 heteropoly acids、 con-exchange、 resins、 molecular sieves、 niobic acid、 vitamin C、 iodine、 sulfate、 chloride、 montmorillonite and etc.

综述了固体超强酸、杂多酸、固载杂多酸、脱铝超稳沸石、树脂、分子筛、铌酸、漆酚衍生物、维生素C、碘、硫酸盐、氯化物、蒙脱土等40多种催化剂催化合成缩醛的方法和反应条件。

As a con- clusion,it is put forward that the stock market's deviation from the eco- nomic running is temporary,and in the long period,the economic running still shows constraint in the development of the stock market.

实证研究的结果表明，目前股市背离国民经济运行只是暂时的现象，在一段较长的时期内，我国的股市发展依然受到国民经济运行状况的制约。

Durkheim,a French soci- ologist,thought that suicide was one manners of collective flaw and it mirrored the usual social reasons and social con- ditions.

法国社会学家迪尔凯姆认为自杀反映了一般的社会原因和社会状况，是人类所遭受的集体疾病的一种表现形式。

Con un esempio si potrebbe dire che se l'utente clicca sul link Edit, per modificare come è fatto un singolo prodotto, la pagina esegue la relativa action PageAction.

作为一个例子，我们可以说，如果你在编辑链接编辑点击作为单一产品取得，页面执行其行动 PageAction。

The review is confined to the deformation theory version, though the flow theory version can be parallelly con structed.

本文的讨论虽限制在形变理论范围内，但按照相应的方法也可以得到流动理论的形式。

Based on current references about periclase expansion, it is considered that MgO con- tent limitation stipulated in the present national cement standard should be replaced by examining cement soundness with autoclave expansion test in order to guarantee quality of concrete engineering and to make full use of limestone resources.

所以直至今日仍有很多学者在为保证混凝土长期安定和合理使用资源两者之间探索新的路子。我国水泥标准在1977年修订时放宽了MgO规定，但它并不完全是建立在科学的，合理的基础上，其规定本身在实践中尚存在矛盾现象。

Because of the"phototactic effect",the expenditure of the advanced technology wars is much greater thanthe wars in the past and presents the tendency to grow speedily,which forms a sharp con-tradiction with the rigid restraint of the resource supply.

高技术战争由于&趋光效应&的作用，其耗费比以往战争要大得多，并且呈现急剧增长之趋势，与刚性资源供给约束形成尖锐矛盾。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。