efficientadj.效率高的；胜任的efficient routine经济工况efficient microbe高效微生物efficient mutagen高效诱变剂efficient conduct对 ... 处理得力efficient welding高效焊接efficient payload有效载荷efficiently clean高效洁净efficient sentence有效句efficient silencer高效消音器efficient enforcer效率很高的统治执行者

1. Utter waste, together with inefficient use of water reserves exacerbate the crisis.
   浪费加水资源的非有效利用更加加剧了水危机。
2. This is a guide on how to effectively use Attack Bikes and Raider Buggies.
   这是一篇教你如何有效利用摩托和四驱车的指导。