广播电视英语短句 第 348 课：土壤污染-5

Home gardeners should plant away from the foundation of their house. 家庭菜园应该离房屋根基远一些。

And lead amounts can be especially high near industrial areas and waste dumps. 工业区附近和废料堆旁（土壤的）铅含量尤其高。

Soil should also be tested for its pH level, a measure of the acid and alkaline balance. 土壤的 PH 值也应该测量一下， PH 水平是反映酸碱平衡的量度。

Experts say the ability to take up lead is reduced when the pH level is above six and a half. 专家们指出当 PH 值高于 6.5 时，植株吸收铅的能力就减弱了。