scavenging system

• 清除系统

scavenging system的用法和样例：

例句

1. The jet engine requires a huge scavenging system sometimes using half as much power as the tunnel itself in order to keep contamination low.
   喷气发动机试验要求庞大的排气清除系统，以减轻污染，该系统有时要耗去风洞本身功率一半之多。