科学家在土壤样本中检测到了高浓度的高氯酸盐污染物。

Scientists detected high levels of ___perchlorate contamination in the soil samples.

这种烟花含有高浓度的过氯酸盐，可以产生明亮的色彩。

This firework contains high levels of ___perchlorate to produce bright colors.