Pb contamination的用法和樣例：
例句
- There will always be a small amount of lead contamination from the refining process of tin.
在錫的精鍊工藝中總是會導致少量的鉛污染。 - Mycorrhizae colonization of the three species and the nodule biomass of K. striata were reduced by elevated soil Pb concentration compared to control.
與對照相比，鉛污染顯著降低了雞眼草的菌根侵染率和根瘤生物量。
