Tourism must try to be eco-friendly.旅游业必须尽力做到环保。This vehicle driven by electrical engine, which is surely more eco - friendly.车子的动力采用电动方式, 更加的洁净环保.Our ground beef, for example, has always been fairly eco - friendly.例如我们的...

adj.对生态环境友好的，不妨害生态环境的...

eco-friendly的音标：...