On the individual level ... on certain days in winter when the air-quality index is over 150, we prohibit residential wood-burning.
冬季当空气质量指数超过一百五十的那几天，我们禁止居民燃烧木材。
2
The burning technics and the performance index of the control system are summarized.
简述了热风炉燃烧工艺和控制系统性能指标；
3
Determining the index of days through the analysis for mathematical statistics, and controlling effectively the burning-rate performance of the full-size solid engine.