单位元素

Any square matrix (a matrix is square if its number of rows equals its number of columns) is an identity matrix if all values are 0 except those diagonal from the top left to the bottom right which instead have the value of 1 - the locations where the row position equals the column position.

任何方形矩阵(一个矩阵的行，列数相同)，只要是从左上角到右下角这条对角线上的元素值为1，其余为0的，就是一个单位矩阵。

The software analyzes your diet using macronutrient blocks as well as convenient household units.

该软件分析你的饮食用巨量元素的楼宇，以及方便的家庭单位。

Pixel: in full picture element; smallest resolved unit of a video image that has specific luminescence and colour.

像素：全名图像元素，视讯影像最小的解析单位，有特定的光度和颜色。

Pixel: A picture element. A spot on a display screen that can be selectively turned On or off. The basic unit Of a graphic display.

像素：图像的一个元素，即显示屏上的一个点，可有选择地让它亮或暗，是图像显示的基本单位。

Firstly, your water elemental is a mana replenisher.

第一，你的水元素是个回蓝单位。

The characteristic vector of the real symmetric matrix should be found out, which is orthogonalized and normalized to a standard orthogonal base and is used as row vector to construct the transformation matrix P, so the P~(-1)AP can be made into diagonal matrix.

实对称矩阵A经相似变换P-1AP可化为对角矩阵，在x =Py 下，不一定能化A的二次型为标准型；应寻求对称矩阵A的特征向量，将其正交化并单位化作为标准正交基，作为列向量构造变换矩阵P，可使P-1AP=Λ为对角阵，在x =Py 下，要将二次型化为标准型，且二次项系数即为对角阵Λ主对角线上元素。

An atom is the smallest characteristic unit of an element.

原子是元素最小的结构单位。

By the definition of Vague values——the elements in the closed subinterval set of the unit interval [0,1],some new definitions of binary Vague relations,operations of relations,inverse relations,compositional operations and λ-cut relations are introduced.

通过对单位区间[0，1]的闭子区间集中的元素——Vague值的定义，引入二元Vague关系、关系运算、逆关系、关系的合成、λ-截关系等新的定义。

Nutrition solution culture, ICP-AES, the differential centrifugation technique and sequential chemical extraction method, suppression subtractive hybridization , RAPD were used in this thesis to study the mechanisms of copper tolerance and accumulation by Commelina communis grown in copper mine deposit which was reported to be a Cu hyperaccumulator, compared with C. communis grown in normal soil. Several aspects were examined, including: difference of copper tolerance and accumulation between C. communis grown in copper mine deposit and that grown in normal soil; difference of growth and nutrient accumunation between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; physiological differences between between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; subcellular distribution and chemical forms of Cu in C. communis; identification of cDNA fragments differentially expressed in C. communis grown in copper mine deposit; genetic diversity and copper tolerance of C. communis, tolerance mechanisms to copper in C. communis are discussed.

中文题名鸭跖草对铜的耐性机理和富集特征研究副题名外文题名 Mechanisms of Cu tolerance and accumulation by Commelina communis 论文作者廖斌导师蓝崇钰束文圣学科专业环境科学研究领域\研究方向学位级别博士学位授予单位中山大学学位授予日期2003 论文页码总数128页关键词重金属污染植物修复超富集植物土壤污染铜污染鸭跖草馆藏号BSLW /2003 /X53 /12 论文以本实验室报道的生长于矿山上的铜超富集植物鸭跖草和生长于正常土壤中的鸭跖草为试验材料，分别运用溶液培养法、ICP-AES元素测定技术、差速离心法和化学试剂逐步提取法、抑制消减杂交技术、RAPD技术研究了矿山和非矿山两种生境鸭跖草对铜的耐性和吸收积累的差异，两种生境鸭跖草在铜胁迫下养分吸收和积累的差异，两种生境鸭跖草在铜胁迫下生理反应的差异，以及铜在鸭跖草细胞内的分布及结合形态研究，矿山鸭跖草差异表达的cDNA克隆，铜对鸭跖草种群遗传分化的影响，从这几个方面探讨了矿山鸭跖草对铜的耐性机理。

Color international oil Co.,Ltd. was established in 2004.Japan.the only oil company in the Chinese mainland authorized units, the company is a concentration of research and development, production and processing. petrochemical trade into an integrated marketing services to the petrochemical industry, with an annual production capacity of 10,000 tons. Using the full import of technology and formula All products use non-depth dewax base oil mixture and active elements of the extreme pressure and anti-wear agents Run Join from compound additive blending.

嘉能国际石油有限公司成立于2004年，是日本石油公司在中国大陆唯一的授权单位，本公司是集科研开发、生产加工、石化贸易、销售服务为一体的综合性石化企业，年生产能力为一万吨，公司应用全套进口技术及配方，所有产品均采用深度异构脱脂基础油配以非活性元素的极压抗磨剂和润英联附合添加剂调合而成。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。