算生态账，就是在算民生账。从“盼蓝天”到“拍蓝天”再到“晒蓝天”……党的十八大以来，我国GDP翻了一番多，PM2.5平均浓度下降了59%。
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县城有种在失序中令人心安的感觉。大城市日新月异，农村人越来越少，仿佛只有县城，还保留着旧日的底色和新时代的光辉。
When updating the rows we’ll only need to update the Y coordinates, but we do need a table of subsequent Y coordinates. That’s one row shorter than usual because we handled the top row as part of the original shadow_loc definition:
Most programs lie somewhere in between, and you have to decide which errors are unexpected. For example, are memory allocation errors expected in your program? It depends.