The interdecadal variation of rainfall intensity shows that the regional mean days of small precipitation and middle precipitation have a decreasing trend over the upper reaches of Yangtze River.
长江上游降水强度也存在年代际变化，区域平均的弱降水天数和中等强度降水天数都呈现减少的趋势。
PURPOSE: To determine diurnal variation of tear menisci around upper and lower eyelids in normal subjects.
目的：确定正常个体中上下眼睑周围泪河凹面的昼夜变化。
Figure 1 shows that the increase in variation is almost entirely due to a heavy upper tail to the distribution of the marks.
图1表明，在变化的增加几乎完全是由于沉重的尾巴上的分布情况的痕迹。
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