查询词典 elements

Nature, most elements have two or more isotopes, the same kinds of elements in the quality of the various isotopes of different, but the types and proportion constant (except for radioactive elements). In 1961, the carbon content of the most abundant in nature, a kind of isotope, carbon-12 atom of a quantity and quality of C as a 12 mass units to it as "benchmarks" for all isotopes of an element according to the average abundance The ratio of the benchmark is the atomic weight of this non-prime, that is listed in the periodic table of atomic weights.

自然界中大多数元素都有两种或更多的同位素，同种元素的各同位素质量不同，但其种类和比例是恒定的。1961年，把碳在自然界含量最丰富的一种同位素，碳12的一个原子的质C量定为12个质量单位，把它作为"基准"，某种元素的所有同位素按丰度的平均值与基准之比，就是这种无素的原子量，即元素周期表列出的原子量。

All the volcanic rocks present younger K-Ar age (less than 5Ma), which can be termed as Cenozoic rocks. In general speaking, volcansim can be dividied into two eruptive stages. In the first stage, volcanic rocks for Pliocene epoch (4. 4-5Ma) consist of basanite and tephrite, which distributed on Mt. Crater, Cape Bird, and southern bank of Bonney Lake; In the second stage, volcanic rocks for Quaternary (less than 1 Ma) are mainly composed of latite, which are distributed on Cape Rodeys and Cape Evens.On the basis of geochemical data such as major elements, trace elements , rare earth elements, isotope, microprobe analysis, combined with main achievement taken by previous researcher in this area, conclusions are drawn basically as follows

所喷发的火山岩K-Ar年龄值均小于5Ma，为新生代火山岩，大体上可以分为两个喷发阶段，第一个阶段为上新世火山岩(年龄值为4.4-5.0Ma)，主要由碧玄岩和碱玄岩组成，分布于罗斯岛上的克雷克特山、鸟角和泰勒谷的博尼湖南岸；第二阶段为第四纪火山岩(年龄值均小于1Ma)，主要由安粗岩组成，分布于罗斯岛上的罗德角和伊万思角，通过主要元素、微量元素、同位素结合电子探针以及前人的研究成果，我们大体上可以得出如下认识

Subwavelength binary optical elements, because of the special property traditional optical elements do not possess, expands the applied field of binary optical elements.

亚波长结构的二元光学器件，由于具有一些传统光学元件所不具备的特殊性质，因而扩展了二元光学器件的应用领域。

In this method, as each boun dary element is connected with finite number of elements, and coupled with boundary elements through finite number of elements, the merit of the FEM is therefore fully used.

这种方法规定各边界单元只和有限单元相接，通过有限单元实现边界单元的耦合，发挥了有限单元法组装方便的特长。

The geochemical characteristics and depositional environment of Pengcuolin chert are studied based on the field investigations and analysis on major elements, trace elements and rare earth elements.

通过野外地质调查和系统的岩石化学、常量元素、微量元素以及稀土元素等研究，探讨了藏南彭错林硅质岩的地球化学特征及其沉积环境。

Through interviewing 3 different adulthood subjects with the open question method and subjects rating short scale items, the results showed that (1) all 3 age groups (young adults, middle-aged adults, and older adults) responded and rated mutual considerateness and tolerance as the most important elements for maintaining marital relationships;(2) all 3 age groups shared the belief that mutual respect, trust, encouragement, concern, understanding, care, and thanksgiving and responsibility were also important elements for maintaining marital relationships; and (3) all 3 age groups rated shared interest, activity, discussion topic, belief and value, and occupied time and personal space as the least important elements for maintaining marital relationships.

经由对三不同成人期已婚受试以开放式问题访问与受试在简短量表的回答，本研究结果显示彼此体谅、容忍是各年龄组受试认为是维系婚姻关系最重要的因素。彼此尊重、信任、鼓励、关心、了解、有责任感、相互照顾彼此感恩是各年龄组受试所共同认为是维系婚姻关系较重要的因素。有共同的兴趣、活动、话题、信仰、价值观与拥有各自的生活空间与时间是各年龄组所共同认为是维系婚姻关系较不重要的因素。

A determinant in which all elements are zero except the elements of the principal diagonal and the elements immediately above and below this diagonal is called a continuant.

一个行列式除了主对角元素以及紧靠对角线的上面和下面的元素外，所有的元素均为零者叫做连行列式。

It was found that the relationship between the nonsmooth appearance of leaf surface and its wettability is very strong, and the shape and distribution of the non-smooth elements are the decisive factors. The surface with regular distribution of convex elements presents large contact angle, strong water repellence, and good self-clearing ability, and that of hairy non-smooth elements takes the nextplace.

试验结果表明，植物表面具有的非光滑形态与表面润湿能力的强弱有极大的关系，非光滑单元体的形状和分布是影响植物表面憎水性强弱的决定性因素；规律分布凸包形非光滑单元体的植物表面的憎水性强，脱附效果好；规律密布表皮毛形非光滑单元体次之。

The paper researches both the present situation and the circumstances of application of domestic competitive intelligence, and emphasizes the importance and necessity of competitive intelligence, according to which the paper finds out the existing problems and sums up the elements of restricting the development of domestic corporations' competitive intelligence as following: the surroundings of competition and condition, the corporations' inner elements and the disjoint elements between the theory research and the practice application of competitive intelligence.

本文从探讨我国竞争情报理论研究现状和国内企业竞争情报的应用状况两方面入手，强调了竞争情报的重要性和必要性，并根据这些现状，找出现存的问题，总结了我国企业竞争情报发展的制约因素：竞争环境与条件因素、企业自身因素和竞争情报理论研究与实际应用脱节等。

The method solves the problems better through adopting the following technical proposal that: the method takes the solid super acid consisting of the VIB group elements or the VIB group elements and the IVB group elements in the periodic table of elements and loaded on a symbiosis molecular sieve as catalyst, and naphtha with the component being C4-C10 as a raw material so as to carry out catalytic cracking reaction at a temperature of between 550 and 700 DEG C, under a pressure of between 0.01 and 0.5 MPa, at a reaction weight space velocity of between 0.1 and 4 hours and with the weight ratio between water and naphtha of between 0.5:1 and 4:1, thereby generating ethylene and propylene.

本发明涉及一种催化裂解制乙烯丙烯的方法，主要解决现有催化裂解制乙烯丙烯催化剂的使用温度高，活性低，乙烯丙烯选择性差的问题，本发明通过使用在共生分子筛上负载由元素周期表VIB族元素或VIB族元素和IVB族元素组成的固体超强酸作为催化剂，以组份为C 4 ～C 10 的石脑油为原料，在反应温度为550～700℃，反应压力为0.01～0.5MPa，反应重量空速为0.1～4小时-1 ，水/石脑油重量比为0.5～4∶1的条件下，进行催化裂解反应生成乙烯丙烯的技术方案，较好地解决了该问题，可用于催化裂解制乙烯丙烯的工业生产中。

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％。