impurities

This food is contaminated with impurities.

这食物已被不洁物质所污染.

Impurities tend to segregate at grain boundaries.

杂质常常在晶粒间界偏析.

There were impurities in the water.

水面上飘着浮渣。

Once its impurities had settled, the oil could be graded.

一旦杂质沉淀下去，油就可以分级了。

Oil is refined to remove naturally occurring impurities.

油经过提炼去除天然存在的杂质。

Semiconductors containing such impurities are called p-type semiconductors.

含有这类杂质的半导体叫做P型半导体.

It is free from air, moisture or impurities.

它不含空气, 水份和杂物.

We had to work off the impurities.

我们得把杂质去掉.

The residual impurities can effect wet-process production in several ways.

这些残留的杂质可能在几个方面影响湿法生产.

A filter will remove most impurities found in water.

过滤器会滤掉水中的大部分杂质。

The impurities present have an important effect on the rate of setting.

存在的杂质对凝固速率有很大的影响.

The buildup of impurities often results in defective plating.

杂质的积累经常导致不良的电镀.

Calcitic limestone is mainly CaCo 3 with relatively small amounts of impurities.

方解石灰岩,主要是由CaCo3和少量的杂质所形成.

The air in the factory is filtered to remove impurities.

工厂里的空气要经过过滤，以清除其中的杂质。

Filtering the water removed some of its impurities.

把水过滤一下除去了一些杂质.