Heavy metals in the soil surely are not very mobile. Lin Shen-lin, who wrote his doctoral dissertation on copper pollution for his Ph.D., and is a lecturer in the Department of Horticulture at National Chung Hsing University, says that no one knows when they will explode.
土壤中的重金屬確實不易移動，以銅汙染為博士論文的中興大學園藝系講師林深林解釋，但誰也不知道何時會發作。