查询词典 step-down

Children have taken the first step to prepare a timely manner after the affirmative, the second step, the third step can be easily handled.

孩子有准备地迈出第一步后，及时肯定，第二步、第三步就好办了。

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。

Statistic analysis result shows that the time step is the most important influence factor of simulation precision, and there is relation between simulation error and the setup value of restitution coefficient which the greater the setup value is, the less the simulation error is. Although there is no effect to the total contact time in the course of collision, the value of the time step decides the total contact step, and there is a logarithmic linear correlativity between them.

统计分析结果表明：计算时步是影响模拟精度最重要的因素；模拟误差还同恢复系数的设定值有关，设定值越大，模拟误差就越小；计算时步的大小虽然对碰撞过程的总接触时间影响不大，但是却决定了碰撞过程的总接触时步数，二者之间存在对数线性相关关系

With the reform step of the commercial bank has expedited, new institutional and constant renew from time to time, conditionality system is step by step to perfect, the management of the fixed assets is request more and more.

随着商业银行改革步伐的加快，新制度的不变更新，相应制约机制的不断完善，对固定资产的管理提出了新的要求。

Because of the problem of convergence, the key techniques to complete the one step simulation were explored thoroughly. The geometry mapping method based on finite element model and inverse deformation was developed to get the approximate initial blank for one step simulation. The effective selection of convergence factor in Newton-Raphson method was studied. The divergence criterion in iterative process for one step simulation was put forward. Also the countermeasure to ill equations coefficient matrix was studied.

由于存在收敛性的问题，本文重点研究了一步模拟方法计算机实现的关键技术：提出了基于有限元模型的几何映射方法和反向变形方法来确定初始毛坯的近似解，研究了带收敛因子的Newton-Raphson方法中如何高效地选取收敛因子，提出了一步模拟迭代求解过程中的发散准则，并研究了病态方程组系数矩阵的修正方法。

Carried on my backpack, grasped my crabstick, move up step by step carefully, every step, the race made me toppleing, the river seemed to show the last stateliness.

打好背包，抓紧手杖一步一步小心翼翼向前挪动着脚步，每踏出一步，汹涌的急流就冲得我摇摇欲坠，好象在向我显示着它最后的威严。

The first step is to clean the hawthorns, and then remove the stone. Then use a slender pointed piece of bamboo and string the hawthorns together. The second step is to put water and sugar in a pot and boil it for 20 minutes until it's a liquid. The third step is to put the hawthorns in the pot, coating them in the sugar. The last step is to wait until the sugar cools off and then you're done.

第一步，把山楂洗干净，再把里面的核去掉，用竹签子把山楂串在一起；第二步，把白糖和水放在锅里熬20分钟，熬成汁儿；第三步，把山楂放进锅里，蘸上糖；最后一步，等糖冷却了以后就可以了。

Huangshan step by step mountain road step by step scenery, four sides the high peak strange lycopodium cloud gets a panoramic view, says it " considerably ".

登泰山，不象黄山步步山路步步景，四面奇峰怪石松云尽收眼底，谓之&可观&。

Zhuang Mashan do in the gym for the dead when the soul of the dead ascend to heaven as soon as possible, must undertake a "step towards" the clearance, step by step around the lantern and Tap dance called "lantern step."

马山壮族人在为死人做道场时，为尽快使死人灵魂升天，必须经过&踩朝&这一关，因围绕花灯踩步跳踏而又名为&踩花灯&。

14Th century BC, Ramses II of the ancient Egyptian empire 100,000 people have a standing army; the 8th century BC Sargon II of the Assyrian Empire team has a step-by-step 200,000; Persian King Darius Millions of so-called step-by-step team.

公元前14世纪拉姆西斯二世的古埃及帝国拥有常备军10万人；公元前8世纪萨尔贡二世的亚述帝国拥有20万步队；波斯王大流士的步队则号称百万。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。