患者控制饮食的比例在干预后先增加后减少，但无统计学意义；
The proportion of dietary control decreased after a little increase, but not statistically significant;
灌木层、草本层地下部分与地上部分的比值随海拔的升高均呈先增加后减少的趋势。
The ratio between underground biomass and aboveground biomass of shrub and herb layer increases first, and then decreases with the rising of elevation.
结果表明，随等温温度的升高，贝氏体、残余奥氏体的量以及残余奥氏体中碳浓度先增加后减少。
The results show that, with the increase of holding temperature, the amount of bainite and retained austenite, the carbon concentration in retained austenite first increases and then decreases.
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