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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。

Very interesting Mongolia philately covers, sending by a Chinese stamps collector in Ulan Bator to Beijing China, Sending on Dec 31th 2008 and Beijing dater Jan 7th 2009, using of 1981 Mongolia space plan FDC cover, The cover set of 7, We have 8 sets on stock, because all cover franking with diffents Space subject and other stamps on envelop, so the buyer will receive a similar 7 covers one set.

我们寄往中华人民共和国和台湾的邮件收取运费和合并运费的计算方式与海外相同，即在收取单项物品的最高运费(最低4美元)的基础上每增加一项加收0.30美元。我们只采用中国邮政特快专递来运送中国大陆买家的订单，不接受普通挂号邮件作为邮寄方式，因此，不会为中华人民共和国买家调整运费，不同意此项运费计算方式的中国买家请勿出价。

The upper member of the protective cover generally overlies the upwardly facing surface of the robot arm while the peripherally extending sidewall generally overlies the outwardly facing surface of the peripherally extending sidewall. In similar fashion, a protective plate of thin-walled plastic material impervious to fluids may also be removably attached to the downwardly facing surfaces of the robot arm and includes a peripheral rim generally coextensive with the peripherally extending sidewall of the link and proximate the lower rim of the protective cover when both the protective cover and the protective plate are so attached.

以相似的方式，一个由液体不能透过的薄壁塑料制成并且也被可拆卸地固定在该自动臂的下工作面(34)上的保护板(46)，该保护板包括一个周边边缘(48)，当保护盖(38)和保护板(46)都这样地固定在该自动臂上时，该周边边缘大体上与该连杆的沿周边方向延伸的侧壁(36)共同地延伸，并且靠近该保护盖的下边缘。

This machine is used for hardcover,book cover''''s paperhanging,tumbing box leading cover to binding equipment,holding in tow side paperboard,and tumbling box press the remain air.It makes cover smooth and beauty,the size can adjustby hand,work with single edge binding machine can finish the whole craft simply and quickly.

用途： 此机台针对精装书壳，文件夹、书面的装裱成型，其道动滚筒将封面引至包边装置，由包边装置将粉纸两边折入紧贴灰板纸，压轮及滚筒将空气压出，令封面平整、光滑、美观，尺寸大小由手轮任意调节，操作简捷，配用单边包边机，完成整个工艺。

Bond strength may be an easy way to test: If the cover page with a coating material or fabric, and so on and Board bond, of post-drying in bond over time, will cover material on jeyang to pull apart, should be able to bring push-out of cardboard surface tear tape, books and cover bond tore post-drying reached does not open or a leaf out of another layer of still being bonded on it, you can achieve the requirements.

黏结强度可用下述简单方法测试：如封面用涂布类材料或织品等与纸板黏结，在黏结干燥后的一定时间，将封面料揭撕开时，应能把被黏结的纸板表面也撕带下一层，书册与封面黏结干燥后达到撕不开或撕下一层，而另一层仍被黏结在上面，即可达到要求。

Based on the acquisition –processing-abstraction of data, the structures an quantities of land use/cover change, the change of degree, the land use/cover dynamic degree and the index of the land use/cover dynamic degree were researched and analyzed comprehensibly in two different periodes(1990-1999,1999-2002) and sum up the conclusion.

结构变化不明显。水域、居民地、耕地动态度比较大，变化较为剧烈；未利用地动态度最小，变化缓慢。1990-2002年间水域、居民地、耕地与其他土地利用/覆盖类型间相互转化面积差额较大，转入面积大于转出面积，即在相互频繁转换同时单边转入明显；林地、草地、未利用地与其他土地利用/覆盖类型间相互转化面积差额不大，处于一种动态均衡状态。

The card ejecting mechanism, comprises: a body having a card insertion hole through which a card is insertable in a push manner; a cover openably mounted at the body for covering the card; and an operation unit disposed at the cover for releasing a locked state of the cover and releasing a locked state of the card when pushed.

该卡弹出机制包括：主体，其具有可通过其以推动方式插入卡的卡插入孔；盖，其被可打开地安装在主体，用于覆盖卡；和操作单元，其被设置在盖，用于当被推动时释放盖的锁定的状态和释放卡的锁定的状态。

Therefore take the example of Qingdao, adopt the technology of remote sensing, geographical information system and global position system, employ mathematics models to study its changes of land use and land cover and make an analysis on the human driving forces which have formed the present pattern of land use and land cover and caused the pattern changes of land use and land cover. The aim of the study above is to help people understand and deal with the relation between economic development and tillable land protection, thus harmonize the tillable land protection with economic development and population development in the future.

选择青岛市作为山东省典型例子，采用遥感、地理信息技术和全球定位技术，利用数学模型来定量研究区域土地利用／土地覆被的时空变化，同时还对土地利用格局及土地利用格局变化的驱动因素进行了分析，以便正确认识和处理经济发展与耕地保护的关系，耕地保护与未来经济发展以及人口增长协调发展。

And he shall cover the holy chalice with the veil; and in like manner shall cover the holy paten with the start-cover and the veil.

基督啊，祢的言语是何等神圣，何等可爱，何等甘甜！因祢曾忠实地许诺将与我们同在，直至世末。

In particular, I Division of the car cover, motorcycle cover, anti-ice cover, the three-tier composite shrouds and other products, received the "China Medium Light Product Quality Assurance Center," about the quality of products, the focus of the protection of the credibility of two-unit model to promote the title of .

特别是我司的汽车罩、摩托车罩、防冰冻罩、三层复合隔热罩等产品，获得了&中国中轻产品质量保障中心&关于产品质量、信誉双保障的重点示范推广单位的称号。

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。