查询词典 trace

Objective To establish a simple and rapid method for determination of trace chromium in drinking water.

目的 探讨生活饮用水中微量铬的简便、快速的测定方法。

The objective of the study was to explore the effect of trace chromium in feed by spectrophotometry.

目的］探索分光光度法测定饲料中微量铬的效果。

The method was applied to quantitative separation and determination of trace chromium in water.

方法可用于环境水样和废水中微量铬的测定。

China is the kingdom of chrysanthemum, where all trace of it.

我国是菊花的王国，哪里都有它的踪影。

The color in yellow Chrysoberyl is due to iron trace elements.

金绿玉因铁痕量元素的存在而呈现出黄金绿色。

Twenty four chrysoberyl and alexandrite samples from the major deposits all over the world were studi- ed qualitatively by XRF and the trace elements in chrysoberyl were gotten mainly to be Fe, Ga, Ti, in alexandrite to be Fe, Cr, Ti.

对24块世界主要产地的金绿宝石和变石进行X荧光能谱分析，得到其所含的主要微量元素分别是Fe、Ga、Ti和Fe、Cr、Ti。

There is lower trace element concentration in middle sample stations than closing to continents in Chukchi Sea.

北极楚科奇海微量元素在中间采样站位值较低，而离陆较近的周围采样站位有着较高的含量，受陆源物质输入影响明显。

There is lower trace element concentration in middle sample stations than closing to continent\'s in Chukchi Sea.

北极楚科奇海微量元素在中间采样站位值较低，而离陆较近的四周采样站位有着较高的含量，受陆源物质输进影响明显。

Chinese traditional herbal drugs for relieving away heat and toxic were treated with cineration,and the residues were dissolved by HNO_3.Eleven trace elements including,calcium,magnesium,manganese,copper,iron,zinc,cadmium,lead,cobalt,nickel and chromium in twenty sample solutions were determined by flame atomic absorption spectrometry.

采用灰化法处理样品，HNO3溶解灰化残渣，用火焰原子吸收光谱法测定了射干、白头翁、山豆根、鱼腥草、连翘、大青叶、车前草、野菊花、金银花、莲子芯、蒲公英、板兰根等20种中草药中的Ca，Mg，Mn，Cu，Fe，Zn，Cd，Pb，Co，Ni和Cr共11种微量元素。

First, a special normal transversal at the initial point is constructed and a second-order Taylor's algorithm is used to trace the projections along the aforementioned normal transversal. A curvature based method for controlling iteration step is further proposed by projecting the given point onto the curvature circle of the normal transversal at the initial point. Finally gradient based method for correcting iteration errors is put forward.

首先构造初始点处的一条特殊的法截线，并给出沿着该法截线追踪投影点的二阶泰勒迭代方法；然后将给定点向初始点处的法截线的曲率圆作投影，提出基于曲率的步长控制策略，在此基础上给出了基于梯度的迭代误差矫正方法。

They have quite a lot of work to do.

他们有许多工作要做。

Let us give you a more elaborate example of this process.

让我们给你这个过程的更多的详细例子。