trace 四级六级考研GRE

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

灭火后不留痕，是取代卤代烷灭火器的替代品。

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。

There was not a trace of cynicism in his voice.

他的语里没有一丝挖苦。

There are traces of poison in the fish.

这种鱼体内有微量的毒素。

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

他工人阶级身的所有痕都给有意地隐藏起来了。

They feared some undetected trace of poison.

他们担心一些未被识破的投毒痕。

Trace an analogy between pastoral poetry and landscape painting.

找田园诗和风景画之间的相似之处。

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

爪印和老虎的足同样是常用的计算老虎数量的方法。

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

中量元素和微量元素的含量随着生长有所增加，但是波动不大。

Kelp is rich in vitamins and trace elements.

大型褐藻富含维他命和微量元素。

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

种子包含氢氰酸和微量的毒白蛋白。

We traced the trouble to a faulty transformer.

我们查故障在一个有毛病的变压器上。

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微量元素微区分析方法——同步辐射X射线荧光分析法。

In spite of the mist the sailors could trace the outline of an island.

尽管有雾, 水手们还能依稀看一个岛屿的轮廓。

The names were traced out in stark black print.

这些名字是用醒目的黑体字印的。

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。

The custom traces to the time of the Warring States.

这个风俗可上溯到战国时期。

Age has left its traces on her face.

岁月在她脸上留下了痕。

The bed bore traces of having been slept in.

那张床上留有被人睡过的痕。

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字母。