查询词典 trace

Yet they leave no sort of trace in the archaeological records unless they are captured by a on the dictaphone or written down by a clerk.

并不是所有的人类行为都留下化石。

The words I utter and you hear as vibrations in the air are certainly human changes in the material world and may be of great historical significance. Yet they leave no sort of trace in the archaeologicalrecords unless they are captured by a dictaphone or written down by a clerk.

我说的话，你通过空气振动听见，这当然是人类造成的物质变化，也可能有重大的历史意义，但这些话在考古学中未留下丝毫痕迹，除非有人用录音机录下来或文书把这些话写了下来。

In this paper, the effects of destruction of trace organic priority pollutants in dinking water with the method are studied, some problems related to applying this method to drinking water purification are inquired, and factors affecting the destruction rate are investigated.

本文研究光催化氧化法对饮用水中微量有机污染物的去除效果，探讨将该方法应用于自来水深度净化所涉及的问题并对影响有机污染物降解速率的多种因素进行了研究。

The diorite enclaves and granites in Middle Jurassic share the same REE and trace element pattern.

随着SiO〓含量增高，P和Ti负异常及Th和K正异常越来越显著。

Based on this, a new method for the direct determination of trace Zn was established.

该方法操作简便快速，具有极高的灵敏度，可用于水样中痕量锌的测定。

She put the letter into her pocket and offered her visitor a smile of welcome, exhibiting no trace of discomposure

她把信塞在口袋里，向客人发出了欢迎的微笑，没有泄露一丝心绪不宁的痕迹。

She put the letter into her pocket and offered her visitor a smile of welcome , exhibiting no trace of discomposure and half surprised at her coolness

她把信塞在口袋里，向客人发出了欢迎的微笑，没有泄露一丝心绪不宁的痕迹。

She put the letter into her pocket and offered her visitor a smile of welcome, exhibiting no trace of discomposure and half surprised at her coolness

她把信塞在口袋里，向客人发出了欢迎的微笑，没有泄露一丝心绪不宁的痕迹。对这种镇静，她自己也有些吃惊。

The main objective of this dissertation was to develop methodologies with capability of engineering application for simulating flow in fractured rock using discontinuum models. The study work includes three parts. In the first part, numerical methodology of three-dimensional discrete fracture network model casing on hybrid BEM-channel was presented, and the technique for improve the model's computing efficiency was also studied. Firstly in this part, computer simulation methodology based on the Baechermodel for generating network of discrete fractures was presented, which includes the follow details: probability distributions of fracture density,orientation, trace length, size, and aperture and estimation of their statistical parameters; stochastic models of fracture network; Monte-Carlo's simulation method; numerical simulation procedure and technicality.

给出了离散裂隙网络模型所依据的基本假定；发展了基于Baecher模型的离散裂隙网络计算机随机生成技术：详细地推导了单裂隙渗流和多裂隙相交网络渗流的边界单元法公式，发展了离散裂隙网络中稳态渗流的边界元数值技术，并且讨论了相关的具体数值技术细节，如角点的处理方法，单元的自动剖分等：描述了混合边界元—管流模拟方法及其数值实现；研究了裂隙网络的简化方法，并针对裂隙网络边界元法的特点提出了一种改进的分块三角分解法。

Reynolds Stress Model with wall function was adopted to calculate the liquid-phase flow,and Discrete Phase Model was chosen to trace trajectories of solid particles.

采用雷诺应力模型和壁面函数法模拟流体流动，采用离散相模型跟踪颗粒运动轨迹。

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。