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Over a solid acid catalyst, the reaction in which methanol and formaldehyde are condensed into mathylal is reversible. This reaction tends to be completion by reactive distillation and the high-purity methylal product can be obtained.

在固体酸催化剂作用下，由甲醇、甲醛缩合生成甲缩醛，该反应为可逆反应，采用催化精馏技术可使反应趋于完全，并得到高纯度甲缩醛产品。

The resul ts indicated:(1) When micrococcus existed,carbon steel corrosion was accelerated by a loose and heterogeneous biofilm formed on its surfaces;(2)Rpo an d Cc values were close after two days and four days immersion respectively in solutions with micrococcus,which indicated that the metabolization of bacteria became sta ble,and the biofilms under two conditions were tend to be ripe and accordant;(3) The equivalent circuits for situations without or with bacteria were proposed respectively,and the parameters in circuits were also calculated;and (4) Corrosi on reaction impedance with micrococcus showed dispersion effect.

结果表明：（1）小球菌存在时试样表面上所形成的疏松、不均匀的生物膜加速了碳钢的腐蚀过程；（2）有菌存在时暴露2 d、4 d的Rpo值和C c值较为接近，表明细菌的生长代谢过程渐趋于稳定，两种暴露条件下所形成的生物膜趋向于成熟一致；（3）分别提出了有菌和无菌条件下EIS的等效电路，并计算了相应的等效元件参数；（4）小球菌影响下腐蚀反应的阻抗行为存在弥散效应。

The transmission of Bancroftian filariasis can be interrupted when the microfilaremia rate reduced between0.17%～1.15%and the microfilaria density in residual micro-laremias was between1～50/120μl without conducting control measures after basic elimination of the disease.

在基本消灭丝虫病后，当监测点mf率在0.17%～1.15%，残存mf血症者mf密度为1～50条/120μl时，在不采取防治措施的情况下，班氏丝虫病传播趋于阻断。

Minimus C.④The light microscopy and the SEM show that there are some morphological changes at the pre-sector pale spot on the costal vein of the wing in some species of An.

显微摄影和电镜扫描结果发现，微小按蚊形态也出现了部分改变，主要反应在翅前缘脉分脉前白斑的变异上，变异种分脉前白斑趋于消失。

This option is for mirroring unreliable sites whose servers tend to disappear for short periods of time.

这个选项是不可靠的镜像网站，其服务器趋于消失时间很短的时间。

By joining the Rockets as a miscast free-agent star, the kid now faces the possibility of a career filled with disillusionment and mediocrity, not to mention anonymity.

加入火箭队，还不知道要扮演什么角色，这个年轻人的职业生涯可以会趋于平庸，那些出色的表现只能出现在记忆里了。

In more mature markets growth is likely to be moderated as concerns with the credit crunch filter through.

而在一些更为成熟的市场，由于担心信贷危机的渗透所带来的影响，租金增长可能趋于缓和。

With the temperature and strain increasing, modulus of elasticity of steel gradually decreases.

结果表明，钢材的应力－应变曲线随温度升高，应力变小而应变增大，曲线斜率即弹性模量随温度升高和应变增大而趋于零。

The results show that BDT can be assembled on the surface of copper electrode to form monomolecular self-assembled membrane,and the membrane can efficiently inhibit the copper base corrosion in the 3% NaCl corrosion medium and acidic solution.

实验表明：BDT能够有效地组装到铜的表面形成单分子自组装膜，BDT自组装膜能有效地抑制铜基底在3%NaCl腐蚀介质以及酸性NaCl溶液中的腐蚀行为；缓蚀效率随组装时间的延长逐渐升高并趋于稳定，在pH值较低的溶液中仍具有较好的缓蚀效果；当BDT浓度为1.0×102 mol/L、组装时间为40 h时，铜电极的腐蚀电流最小，缓蚀效率最好。

Project management and application development skills --"whether for service providers, software developers or IT organizations -- are characteristics that will be absolute" in 2010, Morello adds.

项目管理和应用开发技术--无论是服务提供商、软件开发者还是IT组织在2010年都将更趋于专业化。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。