什么是 scavenge?To search through for salvageable material: scavenged the garbage cans for food scraps. To collect and remove refuse from: The streets are periodically scavenged. To collect (salvageable material) by searching.To expel (exhaust gases) from a cylinder of an internal-combustion engine.To expel exhaust gases from (such a cylinder).Metallurgy To clean (molten metal) by chemically removing impurities.To search through refuse for useful material.To feed on dead or decaying matter.