查询词典 optically less dense medium

Firstly, XRD, TEM and FT-IR were used to characterize the structure of CNTs treated by dense HC1, dense HNO_3, HNO_3, H_2SO_4-HNO_3, K_2Cr_2O_7-H_2SO_4 and bromic acid. The results showed that purification treatment had no change on the structure of CNTs. But on the top of CNTs have function group such as -OH and -COOH after H_2SO_4-HNO_3 and K_2Cr_2O_7-H_2SO_4 were treated.

采用浓HCl、浓HNO_3、H_2SO_4-HNO_3、K_2Cr_2O_7-H_2SO_4、溴水共5组物质分别对CNTs进行纯化处理；借助XRD、TEM、FT-IR等分析手段对处理前后CNTs结构及形貌进行表征，发现以上5种物质纯化处理并不会对CNTs结构造成很大影响，其中H_2SO_4-HNO_3和K_2Cr_2O_7-H_2SO_4处理效果较好，除杂的同时CNTs端口带上-OH或-COOH活性官能团。

We proved that there exists a dense G (subscript δ) subset of the complete metric space consisting of the vector optimization problems satisfying some conditions ,and each problem in the dense G (subscript δ) subset has stable solution set, which generalized the corresponding results in the literature.

证明了满足一定条件的向量优化问题构成的完备度量空间中，存在一个稠密G集，在此稠密集中每个问题的解集都是稳定的，推广了文献中的相应结果。

Most of the families crowded in the back and south area of the Changjiang River. The three provinces, Kiangsi、 Nanking and Zhejiang, located in the back area of the Changjiang River, are dense set. Kiangsi is the densest place. The two provinces, Fujian and Guangdong, located in the south of the Changjiang River, are vice-dense set.

长江下游流域及以南地区集中了绝大多数谱牒序跋所涉家族，其中长江下游流域的江西、南京、浙江三政区是分布的密集地，以江西为最密集，长江下游以南的福建、广东为分布的次密集地。

The styrene-acrylate spheres were coated with the TiO2 colloidal particles via electrostatic effect and hydrogen bond interactions with the increase of aging time, thus the film-forming capability of the solution was changed. The poor film-forming capability results in the formation of the porous structure with dense, homogeneous island morphology. Then the TiO2 porous films with dense pores can be obtained after two coating-dissolving cycles.

结果表明，TiO2溶胶与苯丙乳液混合后，陈化时间的延长有利于TiO2胶粒通过静电、氢键作用在苯丙乳液粒子表面形成吸附层，从而改变涂膜液的成膜性，形成较为密集、且均匀分布的岛状多孔结构，在此基础上经两次涂膜，即可获得具有致密孔洞的TiO2多孔薄膜。

About 25% of women older than 40 years have dense breast tissue, which makes it particularly difficult to distinguish between healthy and tumor tissue on a mammogram."We all know that mammography is not perfect," commented Eric Winder, MD, professor of medicine at the Dana Farber Cancer Institute, in Boston, Massachusetts. This new technique could be a useful adjunct, particularly in women with dense breasts. There is already increasing use of magnetic resonance imaging in such women, he noted, and this technique might offer an alternative."Strategies for breast cancer screening are becoming more individualized, and we are moving away from a 1-size-fits-all scenario," he commented at an ASCO press briefing that he moderated.

40岁以上的妇女有大约25%有致密乳房组织，使得特别难以藉由乳房摄影区别健康组织和肿瘤组织；达那-法柏癌症研究治疗中心医学教授、Eric Winder医师表示，我们都知道乳房摄影不是最好的，这个新技术可以是有用的辅助方式，特别是属於致密乳房组织的妇女；他指出，这类妇女使用磁振造影的人数已经增加，此技术或许可以提供另一种选择；他在主持ASCO的记者会时表示，乳癌筛检策略变得个人化，我们已经不再用一体适用的方案。

In the process of dense bars horizontal continuous casting, the surface damage of dense bars is a difficult problem.

铸铁型材水平连铸过程中型材表面的拉伤问题是连铸生产过程中遇到的难题。

Leaves sessile; blade broadly oblong or oblong-ovate to narrowly oblong or oblong-lanceolate, 2-6.5(-8)× 1-3.2 cm, thickly papery, abaxially rather paler but not glaucous; laminar glands dense, unequal dots or short streaks; intramarginal glands dense; main lateral veins 4-6-paired, with densely reticulate tertiary venation not or scarcely prominent abaxially; base cordate-amplexicaul, apex rounded to shallowly retuse.

叶无柄 叶片宽长圆形或长圆状卵形到狭长圆形或长圆状披针形， 2-6.5(-8)* 1-3.2 厘米，厚纸质，背面相当浅但不是苍白；片状腺体浓，不相等的小圆点或者短的条纹；近边缘内腺体浓； 4-6配对的主要侧脉，突出的具密网状第三脉不或几乎不；抱茎基部心形，先端圆形对浅微凹。

Kalanchoe; sunken or protected stomata e.g. marram grass; folding, rolling or repositioning of leaves to reduce sunlight absorption, e.g. marram grass; a dense covering of white reflective spines, e.g. cacti; and the development of a dense hairy leaf covering, e.g. Espeletia.

通过减少水分流失而生存的旱生植物的生存策略包括：落叶，如：墨西哥刺木；分泌蜡质覆盖叶片使气孔器被封闭或堵塞，如：滨草；折叠、卷曲或重新排列叶序而减少对日光的吸收，如：滨草；喜砂草盖白色的可以反射太阳光的刺，如：仙人掌；还可以发展出密毛状叶片铺满全身各处，如： Espeletia 。

Based on the hydrodynamic theory of dense gas-solid flow and the kinetic theory of dense gases proposed by Chapman and Cowling, the kinetic theory of cohesive particles flow and constitutive equations of cohesive particles are established.

目前科学家们对粘附性颗粒的流态化研究主要集中于实验研究，数值模拟研究做的比较少，特别是对传统的双流体模型，如何进一步改进完善，以适应粘附性颗粒的气固两相流动的研究，成为当务之急。

In chemical plant,liquefacient ammonia leaking from refrigeration equipment usually disperse in the air and become dense gas at the beginning.With the air coming into the gas,it will be increasingly close to the air density and become non-dense gas.

化工厂制冷装置发生液氨泄漏，泄漏后形成毒气云团在空气中扩散，初期多形成重气云团，在扩散过程中随着空气的不断卷吸，重气云的密度会越来越接近空气，从而转变为非重气云团。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。