查询词典 a trace

First of all, the relative transmittance as a function of time for an impulse incidence is presented by Monte Carlo method to trace the path of the ray incident upon dense fog media.

首先，利用蒙特卡罗方法模拟光在散射和吸收介质中的传输，得到脉冲光在云雾中传输时相对光强与传输时间的关系，从而为分辨载有物像信息的子弹光和形成噪光背景的蛇形光提供了理论依据。

A method has been developed for the determination of trace thorium in soil by inductively coupled plasma mass spectrometry.

采用电感耦合等离子体质谱法对土壤中痕量的钍进行了分析。

In this paper,a method of determination of the trace niobium in nickel alloy by inductively coupled plasma atomic emission spectrometry is investigated.

采用电感耦合等离子体发射光谱对镍基合金中微量铌的分析方法进行了试验。

Carbon dioxide is inexplicably a mere trace gas when it should be the bulk of the air, as it is on other planets.

令人费解的是，二氧化碳理应像在其他行星那样成为大气的主要成分，却仅仅是一种示踪气体。

This is a fast, ingenuity and high efficiency method to determine the trace lead.

是一种快捷、灵敏、高效的测定微量铅的方法。

Crystal ; axial symmetry element ; invariant subspace ; the trace of a matrix

晶体；轴性对称元素；不变子空间；矩阵的迹

Based on the catalytic oxidation of isatin with potassium iodate catalyzed by nickel in ammonia me dium, a kinetic spectrophotometric method for determining trace nickel in oil was developed and the kinetic condition was studied.

基于氨性介质中镍催化高碘酸钾氧化靛红褪色反应，建立了测定油品中痕量镍的新方法，探讨了其动力学条件。

The composition of oxygen isotope is a good tool to trace the origin and formation environment of sulfate.

氧同位素组成是一个非常有效的示踪硫酸盐的起源和形成环境的工具。

Gluskoter H J%Ruch R R%Miller W G%Cahill R A, Dreher G B, Kuhn J K Trace elements in coal- Occurrence and distribution Urbana:Illinois State Geological Survey Circular 499 , 1977,null

代世峰%艾天杰%焦方立%侯慧敏%毛鹤龄%马凤学%李宝春%辛泽时不同成因类型煤的可选性评价煤田地质与勘探， 2001，1

What is called "Karate" is actually a descendent of Southern Chinese boxing forms, and similarly, Judo can trace its origins to the importation of Chinese wrestling and Qinna, the precursor of Jiu-jitsu.

什么是所谓的"空手道"实际上是一个后裔南方拳术的形式，和同样，柔道可以追踪其来源的进口中国摔跤和娜的前身久实。

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％。