trace 四级六级考研GRE

A newly-developed microdistribution analysis method for trace elements——synchrotron radiation X-ray fluorescence analysis is introduced.

本文介绍了一种新型的素区分析方法——同步辐射X射线荧光分析法。

We traced the trouble to a faulty transformer.

我们查出故障出在一个有毛病的变压器上。

Kelp is rich in vitamins and trace elements.

大型褐藻富含维他命和素。

The contents of trace elements and mesne elements changed gently in the growing season.

中素和素的含随着生长有所增加，但是波动不大。

There was not a trace of cynicism in his voice.

他的语气里没有一丝挖苦。

He traced the words with a shaking hand.

他用颤抖的手写下那些字。

There are traces of poison in the fish.

这种鱼体内有的毒素。

Paw print, or pugmark, tracing is another common technique for counting tigers.

爪印和老虎的足迹同样是常用的计算老虎数的方法。

Even the youngest child can trace over the shapes of the letters with a pencil.

即使小孩子也能用铅笔描出字母。

The seeds contain hydrocyanic acid and a trace of a toxalbumin.

种子包含氢氰酸和的毒白蛋白。

All trace of his working-class background was deliberately obscured.

他工人阶级出身的所有痕迹都给有意地隐藏起来了。

The family has traced its ancestry to the Norman invaders.

这个家族将自己的世系追溯到诺曼征服者。

It leaves no trace after fire extinguishing.It replaces for alkylogen annihilator.

灭火后不留痕迹，是取代卤代烷灭火器的替代品。

Trace an analogy between pastoral poetry and landscape painting.

找出田园诗和风景画之间的相似之处。

The bed bore traces of having been slept in.

那张床上留有被人睡过的痕迹。

They feared some undetected trace of poison.

他们担心一些未被识破的投毒痕迹。

Age has left its traces on her face.

岁月在她脸上留下了痕迹。

Bob's book traces his flying career with the RAF.

鲍勃的书追溯了他在英国皇家空军的飞行生涯。

His family traces back to the Norman Conquest.

他的家世可追溯到诺曼人征服英国的代。

The custom traces to the time of the Warring States.

这个风俗可上溯到战国期。