难检字字典在线查询

汉语拼音：hén liàng

1.化学上指极小的量﹐少得只有一点痕迹﹐也叫痕迹量。

1. 化学上指极小的量，少得只有一点痕迹，也叫痕迹量。

• Hence, the preliminary separation and preconcentration of trace elements from matrix is often required.

  因此，从基体中分离和预富集痕量元素显得十分必要。

• The method has been used for the determination of trace beryllium in osmotic water and sediment.

  利用抗坏血酸的增感作用直接测定了渗透水和水系沉积物中的痕量铍。

• However, it may not be possible to remove absolutely every trace of material, even with a reasonable number of cleaning cycles.

  然而，完全除去痕量的物料是不可能的，尽管带有合理的清洁次数。

• The new method was used for the analysis of several trace pollutant in water after its performance was assessed.

  对新方法进行了性能评价并将其用于水体中几种痕量污染物的分析研究。

• It shows that the extraction method can be used for enriching trace nonyl-phenol in water efficiently.

  该萃取方法可有效富集水中痕量壬基酚。

• trace amounts of other plasma electrolytes. In extreme conditions, human Beings may excrete several litres of such sweat in an hour.

  人体的汗液实质上是一种含有痕量其它血浆电解质的稀氯化钠溶液。在极端的环境中，人体可以在一小时内排出几公升汗液。

• Tritium is radioactive and is believed to be the main source of the major traces of 3He found in the atmosphere.

  氚是放射性的，并且确信是大气中痕量3He的主要来源。

• Still, traces of atmosphere can be found as high as 370 miles (600 kilometers) above the surface.

  但是痕量的大气依然存在于离地370英里（600公里）处的高空。

• The method has high sensitivity and fair selectivity and can be applied to direct determination of trace amounts of cadmium in pure zinc.

  方法有高灵敏度和较好的选择性，可用于纯锌中痕量镉的测定。