科学家们利用植物进行生物修复，成功净化了被重金属污染的土壤。

Scientists used plants for ___bioremediation to successfully clean up the soil contaminated by heavy metals.

利用生物修复技术处理石油泄漏是一种环保的方法。

Using ___bioremediation to clean up oil spills is an environmentally friendly approach.