• 1. total variation decreasing: 全变差下降格式
• 2. total variation decreasing scheme: 全变差下降格式

• 1.The total ozone amount at the area of Zhongshan Station has been decreasing during recent 7 years, which is similar to the trend of the global ozone variation.
  近7年来，中山站地区的大气臭氧总量有减少趋势，与全球大气臭氧总量变化趋势相同。
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