"All honorees commit to improving air quality," said Dr. Lucica.
博士卢卡奇表示：“所有获奖者都致力于改善空气质量。”
Three approaches can be used for improving air quality.
有三种方法可以改善空气质量。
"The air quality in Beijing has been improving," Mr Sun declared.
孙维德宣称：“北京的空气质量一直在改善。”
"The air quality in Beijing has been improving," Mr Sun declared.
孙维德宣称：“北京的空气质量一直在改善。”
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