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。
On the individual level ... on certain days in winter when the air-quality index is over 150, we prohibit residential wood-burning.
通过综合指数选择法，选出了优良速生、耐寒家系和单株，并率先选择了速生、耐寒且木材品质好的优良单株。
Ultimately some elite families and trees with rapid growth, good cold tolerance and good wood properties were selected by a comprehensive index method.
结果表明，经过阻燃处理的木材其氧指数和剩碳率比未处理的木材升高，而热降解反应活化能和分解温度降低。
Experimental data showed that for the treated wood there was an increase in char yield and LOI, and decreases in activation energy and temperature of decomposition.
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。
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。
On the individual level … on certain days in winter when the air-quality index is over 150, we prohibit residential wood-burning.
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