一层

New bone formation was observed to be increasing significamly in both DCN bone cements and DC bone cements with the passage of time. By the end of 24 weeks, new bone had bridged the gap between the proximal and distal fragments in DCN bone cements and DC bone cements. By histomorphological detection in DCN bone cements, Abundant of chondral and new bone islands were seen at the site of defects 4 weeks after the operation and a number of new bones formed and enlarged by both enchondral ossification and appositional formation by the 8th weeks.

研究发现，DCN骨水泥植入4周大量间充质细胞分化，在材料与骨端之间出现一层软骨细胞，软骨细胞继续增生并向编织骨分化；8周材料降解的同时，小梁骨出现；12周新骨长入材料并已经基本替代完成，形成初步骨性连接；24周骨缺损完成骨性连接，新骨进行结构改建，材料内部形态结构明显变化。

Since there is always an arachnoid membrane around the acoustic tumor, the tumor can be removed completely without any damage to the brain tissues.

由于听神经瘤周围有一层蛛网膜与脑组织间隔，所以有可能全切除肿瘤而不伤及脑组织。

The nickel mineralization is contained in a layered basic massif surrounded and underlain by an Archean gneiss complex.

此处镍矿化产于一层状基性岩块内，其四周和下面都为太古代片麻岩杂岩围绕。

The photocathode is coated with sensitive gallium arsenide, which allows for a more efficient conversion of light to electrical energy at extremely low levels of light.

其表面镀上一层很敏感的砷化镓光电阴极涂层，，在极弱光线下它能使光更有效的转化为电能。

Each end of the bone is covered by a layer of cartilage called articular cartilage.

每个月底，骨，是所涵盖的一层软骨所谓的关节软骨。

Before it is served, the dish is thickly dusted with ground huajiao, the fruit of a type of prickly ash tree that leaves a tingle on lips and tongue.

在盛盘之前，还要撒上厚厚的一层四川当地特有的花椒，吃到口里的时候，只觉得嘴唇和舌头都是麻麻的。

The upside in the coping of reative cell and flank sets aspersion shower nozzle, time, aspersion of surface of grey grain of mensurable Xiang Shi, make the surface of limestone covers film of a thin water, when flue gas has spread every reative cell, the SO2 in flue gas and the limestone grain that covering water film undertake osculatory, in entering water film through diffusing, with limestone happening chemistry reacts, 80% above are the by-product that reaction produces gesso crystal.

反应室的顶部和侧面中上部设有洒水喷头，定时，定量向石灰颗粒表面洒水，使石灰石的表面覆盖一层薄水膜，当烟气流过每个反应室时，烟气中的SO2和覆盖着水膜的石灰石颗粒进行接触，通过扩散进入水膜中和石灰石发生化学反应，反应产生的副产物80%以上为石膏晶体。

All fresh assemblies should first b e polished with aspic.

所有刚完成的作品应该上一层肉冻。

At each level of the system, the designer is concerned with structure and function.

在每一层上，设计者关心的是结构和功能。

It was further delineated by Hanke and Kretzschmar (4), who coined the term 'round atelectasis.

Hanke和Kretzschmar作了更深一层的描述，他们造了"球形肺不张"这个新词。

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。