查询词典 conservation

To put it briefly, they think water and soil conservation only make soil, stone and dreg fixed, in another word, not allow it take place displacement, it doesn't deeply prevent land from degrade in the land care that make the guidelines of the projects, the measure adopt in water and soil conservation, etc.

简单的说，认为水土保持仅仅是把土、石、渣固定下来，即不让其发生位移，没有深入到防止土地退化方面的土地保育，使得方案的指导思想、采用的水土保持措施等与水土保持的根本目的相去甚远。

James Wong is a Kew-trained ethnobotanist and works for Botanic Gardens Conservation International , the world's largest plant conservation network.

詹姆斯王，民族植物学家，曾受训于英国皇家植物园，任职于世界最大的植物保护网络-"国际植物园保护联盟"。

When making plans for biodiversity conservation for a forest management unit such as forestry bureau or forest farm, we should firstly make conservation priority for different forest types according to the resistance and adaptability of forest to disturbances.

在一个森林经营单位进行生物多样性的保护时，首先应根据不同森林类型对干扰的适应和抵抗力大小确定对各类森林优先保护的次序，然后再在各类森林的不同小班中进行生物多样性间接评价打分表的填写，最后根据不同小班生物多样性得分的多少确定其保护的等级或先后次序。

Since 1950 s, the research of numerical method for hyperbolic conservation laws is one of key research directions in computational mathematics. The finite difference method, specially TVD and ENO schemes, for hyperbolic conservation laws are very successful.

双曲型守恒律方程数值计算方法的研究，是二十世纪五十年代以来，计算数学中的一个重要研究方向。

Further, with the help of Riccati equations, an infinite number of conservation laws for the solton hierarchy are deduced. For the sake of simplicity, taking the general TD hierarchy as an illustrative example, we prove that its 2×2 Lenard pair of operators forms a Hamiltonian pair. Thus the isospectral evolution TD hierarchy is the general Hamiltonian system and possesses the Bi-Hamiltonian structures and Multi-Hamiltonian structures. By using the method of derivation of functional under some constraint condition, a complete one-to-one correspondence between the Hamiltonian functions of the hierarchy and its conservation density functions can be built. These results can also be applied to the isospectral evolution soliton hierarchy of this paper. Finally, there's a gauge transformation between the spectral problem of this paper and the AKNS system. Moreover, the potentials in these spectral problems satisfy the general Miura transformation, the corresponding relationship between the two soliton hierarchies is also given.

进一步本文还通过特征函数的组合关系所满足的Riccati方程，得到了该等谱方程族的无穷多个守恒律；为简便起见，本文以广义TD族为例，由它的2×2 Lenard算子对的性质证明了此算子对为Hamilton算子对，这说明广义TD族是广义Hamilton系统且具有Bi-Hamilton结构和Multi-Hamilton结构；进而利用它的依赖于谱参数的一般守恒密度的积分在约束条件下求泛函导数的方法，得到了广义TD族的Hamilton函数与守恒密度之间的对应关系，这些性质对于由本文提出的2×2谱问题所导出的等谱孤子族仍成立；另外此谱问题与AKNS系统存在着规范变换，位势之间有广义Miura变换，而孤子方程之间也满足一定的等价关系。

We did well in the farm bill in conservation, yet the need is great enough that we should find the funds to make new investments in conservation and in food and agriculture research, according to Harkin.

农业法案在环保方面处理得比较好，但需求仍然非常大，因此我们应该寻求更多新的投资，用于环保出及食品和农业研究，哈金说。

Moreover, The Harte Research Institute, which is committed to supporting and promoting the conservation of the natural resources in the Gulf of Mexico, the International Union for the Conservation of Nature, the Marine Geospatial Ecology Lab at Duke University, that researches the physical structures of the territory in respect of marine life in our Oceans.

另外，旨在支持倡导保护墨西哥湾自然资源的哈特研究中心、世界自然保护联盟、为保护海洋生物而研究地表物理结构的杜克大学海洋地理空间生态学实验室也参与了这项工程。

By using the theories of conservation of momentum,conservation of energy and hydrokinetics,a mathematical model for describing the relationship among the fluid parameters,the formation parameters and the vibrant operation parameters was established.The analytic solutions of one-dimensional and radial transfusion equation for compressive and single-phase fluid flow through the compressive formation were obtained.The effects of each parameter on the vibrant operation were also gotten.On the basis of the above results,the computation models were established.

应用动量守恒、能量守恒、流体动力学等基本原理，建立了地层参数、流体参数和振动作业参数之间相互耦合的数学模型，求出了单相微可压缩流体在可压缩地层中的平面一维和平面径向渗流方程的解析解，得到了各项参数与振动作业效果之间的关系，为振动采油的数值模拟提供了初始压力分布表达式。

Center for Ecology and Conservation Biology is primarily dedicated to education and research in ecology and conservation biology including paleoceanography, ecological economics, sensory biology, behavioral ecology of birds, behavioral ecology and insect sociobiology, evolutionary biology, ichthyology, forest ecology and biogeochemistry, mammalian population genetics, etc.

生态学与保护生物学中心致力于生态学与保护生物学的教学与研究，其研究领域包括古海洋学，生态经济学，感官生物学，鸟类行为生态学，行为生态学和昆虫社会生物学，进化生物学，鱼类学，森林生态学和生物地理化学，哺乳动物遗传学等。

Extraordinary energy-conservation of LED light source, use LED light source to light, compare with traditional incandescence lamp ,it's more than 80% of light source energy-conservation.

LED光源是普通照明领域的第三代新型光源，是国家支持的高效、环保、节能的关键技术类项目，已经被列为国家"十一五"重大科技攻关领域之一。

The father that if work,mad father, love annoys, disposition is too indrawn the be short ofing that the father of Mu Ne, resign oneself to adversity causes father easily to love is broken; Communicate time effectively between father and son, Mu Zizhi to be less than a hour on average to wait a moment every week, it is the cause that causes the child to become addiction.

如工作狂的父亲、爱愤怒的父亲、性格过于内向木讷、逆来顺受的父亲都易造成父爱的缺失；父子、母子之间的有效沟通时间每周平均小于一小时等等，都是造成孩子成瘾的原因。

These are vandal proof and they come with a locking mechanism.

这是野蛮的证据，他们来到了锁机制。