adj.不纯的，不洁的，有杂质的，道德败坏的，(尤指)淫乱的

The water from the river is impure and not safe for drinking.
这条河的水不纯净，不适合饮用。
The air in the industrial area is often contaminated with impure gases.
工业区的空气常常被不纯的气体污染。
The scientist was trying to purify the impure chemical compound.
这位科学家正试图提纯这种不纯的化学化合物。
The gold ore contains impurities that need to be removed before refining.
金矿石中含有需要在提炼前去除的杂质。
The soil in this region is impure due to excessive use of pesticides.
这个地区的土壤由于过度使用农药而不纯净。
The impure mixture had to be separated into its individual components.
这种不纯的混合物必须分离成其各自的组成部分。
The rainwater, tainted by acid rain, is considered impure.
受酸雨污染的雨水被认为是不纯净的。
The impure fuel caused the engine to run inefficiently.
不纯的燃料导致发动机运行效率低下。
The impure salt contained a high percentage of unwanted minerals.
这种不纯的盐含有大量不需要的矿物质。
The experiment failed because the impure reagent interfered with the reaction.
实验失败是因为不纯的试剂干扰了反应。