使覆盖

Meanwhile, the concentration of Pb,Zn and other heavy metals is rather high in the oxidation zone and decreasesdownward to levels that are unbelievably low for Pb-Zn mine tailings. Theseobservations suggest that heavy metals should be re-immobilized by secondaryminerals, rather than primary minerals, in the oxidation zone, and could be leachedout from suboxic environment due to low rate oxidative dissolution which preventsthe precipitation of secondary minerals in significant amount. Thus, cover scenarioswhich establish a suboxic environment beneath the cover layer might not always beeffective in preventing heavy metal release from mine tailings.Sequential extraction studies indicate that, in addition to heavy metal leaching,oxidation of the mine tailings increased the mobility of residual Zn, and Cu, while Pb remains immobile due to the formation of anglesite (PbSO4). Using the seven-step extraction technique developed by Dold (J. Geochem. Explor., 2003, 80: 55-68), galena dissolves in significant amount at step 2 most probably due to the strong complexing of Pb2+ by acetate, while other metal sulfides dissolve at step 6, which suggest that this extraction technique could not be used to evaluate the mobility of lead in natural environment

重金属含量均低于新鲜尾矿，但以硬化层中的含量最高(Pb、Zn含量分别为0.47%和0.93%)，往下大幅度降低，表明尾矿风化过程中形成的次生矿物对Pb、Zn等重金属元素有较强的固定作用，而次氧化带的淋溶作用造成了金属元素的大量流失；(4)与新鲜尾矿相比，硬化层中铅的可迁移性大大降低，硬化层之下尾矿样品中铅的可迁移性也不同程度降低，这是由于硫化物氧化产生的硫酸根与尾矿中的铅反应形成铅矾(PbSO_4)的缘故；(5)氧化作用使尾矿中的zn、Cu等重金属的可迁移性不同程度地增大，其中对锌的可迁移性影响最大，铜的可迁移性与铁比较相似，铅则容易与硫化物氧化形成的SO_4~(2-)反应形成铅矾(PbSO_4)；(6)为了减少尾矿污染和修复矿山环境，人们提出了各种不同的尾矿覆盖方案，本文的研究结果表明，这些方法不一定能够有效地阻滞污染元素的迁移。

Air China has developed on its own the operation management system, integrated satellite telephone system, space data communication system and shortwave wireless system, which made it the first airline company with the super long-distance supervision capacity in the country. In 2004, after the use of shortwave communication systems, the supervision network which has Beijing and Lhasa as the core, covers the Asian continent, the Indian Ocean and Pacific Ocean stretching to the arctic pole area.

国航自行研制开发了运行管理系统，集成了卫星电话系统、空地数据通讯系统和短波无线电系统，使国航成为国内第一家具有超远程监控能力的航空公司，尤其是2004年短波通信系统的投入使用，形成了以北京、拉萨两点为圆心，全方位、全时空、全天候覆盖亚洲大陆、印度洋和太平洋，并延伸到北极区域的监控网络。

Penis residual stump was advanced to anterior portion of the newly restoration penile body as "glans"; To take full layer skin of penis from post-operating patients to observe neurofibril regeneration by light microscopy, electron microscopy and scanning electron microscopy; To determine sensation recovery by physical examination; To check erectile function with NEVA System.

修復术中通过离断阴茎浅、深悬韧带，並继续分离部分海绵体脚，使原固定於耻骨下支的阴茎海绵体充分分离，以使阴茎更为延伸；用含血运的脂肪瓣填塞耻骨前间隙，保证术后远期阴茎的有效长度；选用合適的带血管蒂皮瓣转移覆盖海绵体，塑造更为逼真的龟头和冠状沟样外形。

All kinds of animals were scurrying all around to seek a place to settle down.Kind-hearted mammoth tiger--Manfred,a slakoth who is fonding of food--Sid,tricky smilodon--Diego ,these three animals with different characters get together when they have to return a human child to its father.On their way ,three animals were in numerous contradictions.Diego came up with a deadly trap---inducing them to step in the ambush which is set by his kin.But after they went through the snowslide,the famine and other countless grave dangers,those experiences that they struggling with harsh circumstances together shook Diego's mind....

谢谢！ 故事发生两万年以前冰河世纪那时地球上很多地方都覆盖着冰川奇形怪状动物们四处逃窜希望能够找到一个安身地方心地善良长毛象--曼菲德、嗜食树獭--希德、狡猾剑齿虎--迭哥这三只性格迥异动物为了使一个人类小孩重返家园竟然聚了一起组成了一只临时护送队踏上了漫漫寻亲路一路上这三只动物矛盾重生迭哥心生毒计想诱领队伍踏入自己族类设下致命伏击但们共同经历了雪崩、饥荒等无数险境之后这些与严酷环境抗争经历使迭哥开始对自己计划动摇了。。。。。。

The mass transter can be enhanced ,when we introduce sulfuric acid and cuprous oxide into this system.The model is formed to describe the transference of the martial between the four phases: gas-liquid-liquid-gas, which can explain some problems. We analyze the dead of the catalyst, and make a conclusion that the surface of the catalyst is covered with some compounds such as bluestone, which lessen the activity points of the catalyst and debase the activity.

在SO_4~(2-)／ZrO_2-La_2O_3催化的反应系统中加入稀硫酸和氧化亚铜促进了异丁烯和一氧化碳的传质、使反应得以快速，高选择性的进行，异丁烯的转化率达95％以上，特戊酸的收率达47％；讨论了g-l-l-s传质过程；对催化剂作了失活分析，催化剂失活的原因是因为反应后的催化剂表面覆盖了一层硫酸盐，使催化剂的活性中心数减少，活性降低。

The differentiation states of costae indicates the ways they absorb and transport water, and their ability adapting to the dry conditions, which was elucidated by the following examples: Brachythecium plumosum, because of its thin cell-walls in the costae and the absence of hydrome, assistant and steroid cells, can absorb water and nutrition under shady and moist conditions; Plagiomnium rostratum, though often grows in shady and wet condition, has hydrome and steroid cells, a feature similar to those of xeric mosses, which endows it to grow in the conditions with periodical drought stress during its life cycle; Hygrohypnum luridum is characterized by its slender leaves with only one layer of cells, the thin cell-walls, the absence of filaments on the leaf surface, and the fewer layer cells in the costae, the absence of hydrome and steroid cells. These features make it adaptable to aquatic environments. For Pogonatum inflexum and Atrichum undulatum, their ventral surfaces covered with lamella, while for Racomitrium japonicum, Thuidium cymbifolium, Macromitrium ferriei, Diphyscium fulvifolium, Barbula unguiculata and Ceratodon purpureus, their leaves are strongly mammillose or papillos. Such appendiculate structures made them adaptable to thy conditions.

例如，荫湿生环境下的羽枝青藓Brachythecium plumosum，其中肋细胞胞壁较薄，无导水主细胞和副细胞的分化，也没有厚壁细胞分化，能够在阴湿环境下吸收水分和养分；钝叶匍灯藓Plagiomnium rostratum具有与旱生藓类植物相似的中肋结构，叶片较厚，中肋具导水主细胞，中肋背面具厚壁细胞，这些特点使该种藓类植物能够分布于间隙性干旱胁迫的环境中；水灰藓Hygrohypnum luridum叶片纤细柔弱，仅1层细胞，细胞胞壁薄，叶表无附属结构，中肋细胞层数少，无导水主细胞分化，也没有厚壁细胞，这些特点使得水灰藓'能够生长在水生环境中；东亚小金发藓Pogonatum inflerum和波叶仙鹤藓Atrichum undulatum的叶腹面覆盖着栉片，东亚砂藓Racomitrium japonicum、大羽藓Thuidium cymbifolium、福氏蓑藓Macromitrium ferriei、东亚短颈藓Diphyscium fuhifolium、扭口藓Barbula unguiculata和角齿藓Ceratodon purpureus的叶片表面有乳头状突起或疣状物，这些附属结构使它们能够适应于旱生的环境中。

To court trailer court trailer park trailer camp 202-cover be covered with blow one's cover break cover draw a cover from cover to cover provide cover for read from cover to cover remain cover take cover under cover under plain cover under the cover of under separate cover under the same cover cover against cover in cover into cover over cover up n.

名誉， 使名誉受坏影响；驳倒，问住；不让发言，使无法应付；不顾，蔑视做出让人蔑视的事在法庭外和解提出诉讼对某人起诉，控告活动住屋集中地活动住屋集中地活动住屋集中地 n。盖子，封面，藉口 vt。覆盖，铺，掩饰，保护，掩护，包括，包含，适用

To cover with a roughened or speckled decorative surface .

使…覆上覆盖表面，使其粗糙或有小斑点

It was also concluded that "Yue Tian 13" is fit to plant at early spring in Guangzhou city, and with the high density resistance character, and Polythene mulching could bring forward to the harvest time in early spring and increase the yield notability through increasing the plant density.

该研究结果充分显示了粤甜13号耐密植性和适合早春种植特性；同时表明，早春地膜覆盖栽培除了缩短生育期，使产品提早上市以外，还通过增加种植的密度增加产量，使种植的经济效益显著提高。

Using entomological radar, we showed that the ability to select seasonally favorable, high-altitude winds is widespread in large day- and night-flying migrants and that insects adopt optimal flight headings that partially correct for crosswind drift, thus maximizing distances traveled.

根据所搜集到的雷达对天空中迁徙飞行的昆虫进行扫描的数据，Jason Chapman 及其同僚显示，在高空飞行的蛾子和蝴蝶能够选择有利的风向并纠正其方向的偏移，这些策略可使昆虫所覆盖的地面最大化，并使它们的飞行时间得到最佳化。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。