/ˈkliːnlɪ/
1
- in a way that produces no dirt, noxious gases, or other pollutants干干净净地, 清洁地, 无有害气体地, 无污染地：
the engine burns very cleanly.
这台发动机消耗燃料时不排放任何有害气体。
2
- without difficulty or impediment; smoothly and efficiently顺利地; 干净利落地：
he vaulted cleanly through the open window.
他干净利落地跃出开着的窗户。
派生词