查询词典 a trace

The succession of points occupied by the particle will trace out a curve in space.

质点连续经过的点描绘出一条空间曲线。

Further examination of the complex forehead wave form reveala morphology consistent with a central venous trace with atrial,cuspidal, and venous waves.

进一步测试复杂的前额波形显示，其与有心房波、瓣膜波和静脉波的中心静脉描记线在形态学上一致。

To study a new simple,rapid and accurate method of determining trace cyanide in foodstuff and water.

研究一种操作简单、快速、准确性高的测定食品和水中氰化物的方法。

With a long history of thousands years,the ancient Chinese dak and post and the ancient Chinese tourism can trace back to the early ancient times.

中国古代驿站和邮传与中国古代旅游可以追溯到远古时代，已有数千年的漫长历史。

This paper presents a lot of PGE and trace dement data based on the discussion on the PGE analyses methods.

本次研究在PGE分析方法论证的基础上，进行了大量样品的PGE分析和微量元素分析。

The deoxidizer of the invention can be reduced and regenerated below 150 DEG C, and can purify the trace oxygen in the olefin with a carbon atom more than 3 at room temperature to less than 0.05ppm.

本发明的脱氧剂可以在150℃以下还原再生，室温下将C3以上烯烃中的微量氧净化至0.05ppm以下。

Objective To study resonance light scattering spectra of diazotization- coupling reaction and establish a new method for the determination of trace nitrite.

目的 研究重氮化－偶联反应的共振散射光谱并应用于亚硝酸根的测定。

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。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。