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The research conclusions above mean that polysilicic acid can react with hydrolyzed aluminum species to form aluminum-silicate polymer composite, which made the species distribution in PASC changed.

但对PASC而言，情况有所不同，在低碱化度和低Al/Si摩尔比情况下，Al13和Alb之间不存在对应关系，Al13和Alb比值远远小于1.0，随着B值和Al/Si摩尔比的升高，Al13/Alb比值逐渐趋近于1.0。

The characteristics of density bands of Porites coral from Meiji reef in Nansha area are revealed by X-radiography of coral slabs and periodical changes of δ^18 O and δ^13 C in the skeletons.

结合珊瑚骨骼X射线照片和δ^18O、δ^13C的年际变化，对南沙群岛美济礁滨珊瑚骨骼岩心的密度条带进行了分析，发现其密度带变化模式多样，初步可归纳为如下3种类型：(1)宽度相近的高低密度条纹均匀、相间地排列，一对高低密度条带平均宽约4mm；(2)在骨骼主生长轴上由近于均匀分布的细密度条带组成。

In academic jargon this stance is called selectionism , and the position is nearly universal among biologists working today.

用学术行话来说，这种立场可以被称为选择论 [4]。这也是当今活跃着的生物学家近于普遍接受的立场。

The disturbances of wave number six vary sinusoidally wi...

波数为6的扰动，变化周期为11—13天，振幅变化近于正弦曲线；波数为4的扰动，其振幅变化较复杂；波数为2的扰动，变化周期为3天。

The Altun fault, a famous tremendous sinistral strike-slip fault in NW China, is composed mainly of the Altun,master fault several secondary subhorizontal, sinistral, strike-slip faults and oblique faults.

阿尔金走滑断裂带主要由阿尔金主干断层与几条近于平行的左行走滑断层和斜交断层组成，其空间分布规律可用左行走滑简单剪切模型解释。

From n-hexane, the adsorption enthalpy of aniline on sulphonic resin in Cu〓 form is nearly zero, the isotherms being independent of the temperature.

在正己烷中，磺酸铜型树脂对苯胺的吸附焓近于零，吸附等温线不随温度的变化而变化。

Cutting pupillary collar continuously seems to be a simple and safe method for phacoemulsification and foldable intraocular lens implantation in cataract with small pupil and serious synechia. The method has slight postoperative reaction and fewer complications. The method also allows the pupil to return to its normal or nearnormal shape, and its function after operation.

对于严重粘连小瞳孔白内障采用瞳孔缘连续环形剪除后再行白内障超声乳化及折叠人工晶状体植入术，方法简单，术中操作顺利，术后瞳孔形态正常或近于正常、光反射存在，眼前节反应轻，是一种较好的手术方式。

It has been warranted through experiments and practical application that rare-earths-high-aluminium heat-resistant nodular iron has some intrinsic properties which are worthy of reconimandation, namely,that it will not scale after long periods of use at 1050-1100℃, will hardly break while being hammered into castings, runners or risers as the high-temperature tensile strength reaches 14-19 kg/mm2 at 800℃ or≥l3.3kg/mm2 at 900℃, with the room temperature strength close to HT 30-50 and the unnotched impact str...

本文介绍了稀土高铝耐热球墨铸铁的生产实践、化学成分；探讨了稀土作用及其用量和控制；论述了稀土和铝加入方式以及冷却速度对金相组织的影响；并对铸造工艺、铸件缺陷及分析、耐热性能及使用效果作了阐明。试验和使用证明：稀土高铝耐热球墨铸铁在1050～1100℃长时间工作不起氧化皮，热强度800℃时，14～19kg/mm~2，900℃时≥13.3kg/mm~2，室温强度近于HT30—54，a_k≈2～6kg·M/cm~2，锤击铸件或浇冒口，很难碎裂，并能机械加工。可以认为是以我国富产资源为原料，能用各种炉子熔炼、耐热和综合机械性能均较高硅、中硅中铝球铁、高铝片墨铸铁为高的一种耐热铸铁，也是镍铬系耐热材料较好的替代品。

Almost all instances generated by standard models are unsatisfiable with probability tending to 1 as the number of variables approaches infinity. In 1998, a survey by Gent et al. shows that most previous experimental studies about random CSP models are affected by this result.

也就是说，在多数情况下，当变量数趋近于无穷大时，经典模型产生的所有实例几乎都是无解的。1998年，英国学者 Gent 等人的综述表明：以往大多数有关随机 CSP 问题的实验研究都受到了此结果的影响。

When the pain became acute, the expression on his face was almost ecstatic - eyelids slack, his mouth drawn back in a smile suggesting an unscratchable itch.

痛苦到了极点，面部表情反倒近于狂喜……眼睛半睁半闭，嘴拉开了彷佛痒丝丝抓捞不着地微笑着。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。