The average residuelevel of DDTs was higher than those in fishes from Britain and Brazil.
多数有机氯农药残留污染的平均水平也高于英国和巴西等国鱼类的水平。
2
They test, resample, and retest equipment or systems until an "acceptable" residuelevel is attained.
他们要检测,重新取样,重新检测设备或系统,直到达到被认可的残留物级别。
3
The results showed that, in addition to a high residuelevel of pollutant in a few tea gardens, the residue of most pollutant in the soil of these Oolong tea gardens was low.