translation.en: And at the same time to scrap inefficient old planes, so that if they were otherwise to come back in the air, they would waste more oil, and block the uptake of efficient, new planes.
translation.zh: 并且与此同时处理掉那些低效的旧飞机 因此一旦他们重新飞上天空 就会浪费更多的油 还会阻碍新型高效飞机的推广使用