Although we must continue to work on this,substantial results have been achieved,including remarkable improvement in air-quality through vehicle emission controls and greater use of clean energy sources.
英
美
- 尽管我们还需不断努力,但是通过控制车辆尾气排放和大量使用洁净能源,我们在包括改善空气质量等方面取得了实质性的进展。