non-residue

例句：

1. 1. The non-residue in the soil isa concern for farmers.
   土壤中的非残留物是农民们关心的问题。
2. 2. The residuefrom the chemical spill was toxic to theenvironment.
   化学泄漏的残留物对环境有害。
3. 3. The residue of the plant material canbe used as fertilizer.
   植物材料的残留物可以作为肥料使用。