查询词典 a trace

As Nadine Hansen of Linx explains, while most food packs already include traceability information, it is now essential to be able to trace information right back to the source of a problem, should the need arise.

由于汉森纳丁的领新解释说，虽然大部分食品包装，已包括可追溯性的信息，现在必须能够跟踪信息的权利回到问题的根源，在有需要时。

5We established a test method for the quantitative determination of trace neptunium by fluorescence of replacement.

建立了置换荧光法测定微量Np的方法。

Only two, neptunium (93) and plutonium (94), occur in nature, and only as trace s in uranium ores as a result of neutron irradiation.

自然界里只有錼(93)和钸(94)两种超铀元素，而且只以痕量存在于铀的矿物中，是受中子辐照后的产物。

But this case is a common problem that often meets in samples of reprocessing.In this dissertation, an indirect fluorescence analysis method to analyze trace neptunium is discussed.

本文利用DTPA-Tb与DTPA-Np稳定性的显著差异，DTPA-Tb的络合常数的对数值是22.71，而DTPA-Np的络合常数的对数值为29.8，由Np~(4+)置换出DTPA-Tb中的Tb~(3+)。

This method of measurement requires a hydrocarbon trace gas, in this case ethane, which is delivered to the tunnel mixed with an inert neutrally buoyant carrier gas, in this case nitrogen.

这种测量方法需要碳氢化合物跟踪乙烷在这种情况下，它是提供给混合惰性，在这种情况下，氮的中性浮力载气，隧道气体。

The former has presented the trace mark of nihility and a state of nothingness of the fragments of soul and mind .

前者呈现的是心灵思维片段要素虚化的痕迹及一种虚在的形态。

A new method for the rapid separation and determination of trace niobium in copper-niobium alloys was presented.

提出了一个快速分离与测定铜铌合金中微量铌的新方法。

Northumbrian Type 诺斯安布赖恩类型 Almost all present-day Border Collies can trace their pedigrees back to a dog known as Old Hemp.

追溯几乎目前所有的边境牧羊犬的血统都集中到一只叫Old Hemp的狗。1894年住在英格兰Northumbrian地区的名为Adam Telfer的人繁育出了Hemp，并一直养育着他。

Based on twin primer design, we developed a general real-time method to trace nuclease activity.

在孪生引物的基础上设计出荧光淬火双链探针，建立了研究DNase Ⅰ酶切活性的实时示踪方法。

The main results can beexpressed as follows:(1)Based on πtheory, some affected factors about wave forces are given, and therelation between affected factors and wave forces is analysised by experimentalresults.(2) The distribution of wave press at representative time and reflection nature aregiven and their variety charactes are discussed by experimental results.(3)By comparing the wave forces of quarter-circular breakwater and semi-circularbreakwater under the same wave conditions,some approximately wave forcesexpressions of quarter-circular breakwater are given.(4)Based on VOF method to trace water free surface,solve numerical value ofRANS equation,and get the distributions of flow field and wave press ofquarter-circular breakwater at the same time during one period,the mechanism ofwave force is also discussed elementarily.(5) Based on the result that RANS equation of numerical simulation agree wellwith experimental results,a new approach to study hydraulic natures of quarter-circular breakwater is provided.

其主要结论如下：一、通过π定理，确定影响波浪力的无因次参变量，根据试验结果对其影响因素进行分析；二、基于模型试验，给出典型时刻圆弧面防波堤的同步波压分布和反射特性，讨论它们的变化特点；三、通过相同条件下圆弧面防波堤与半圆型防波堤两种堤型试验波浪力的比较，给出了圆弧面防波堤波浪力的近似方法；四、利用VOF法追踪自由水面，数值求解RANS方程，得到圆弧堤堤体周围的流场和压力场，初步分析了速度涡流与压力场的相互影响；五、对比数值分析与试验结果，探讨数值方法研究圆弧面防波堤水力特性的可行性，提供新的研究途径

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％。