函数：
ee.Reducer.percentile(percentiles,outputNames,maxBuckets,minBucketWidth,maxRaw)
Create a reducer that will compute the specified percentiles, e.g. given [0, 50, 100] will produce outputs named 'p0', 'p50', and 'p100' with the min, median, and max respectively. For small numbers of inputs (up to maxRaw) the percentiles will be computed directly; for larger numbers of inputs the percentiles will be derived from a histogram.
创建一个将计算指定百分比的还原器，例如，给定[0, 50, 100]将产生名为'p0'、'p50'和'p100'的输出，分别为最小值、中位数和最大值。对于小数量的输入（最多到maxRaw），将直接计算百分位数；对于大数量的输入，百分位数将从直方图中获得。
Arguments:
percentiles (List):
A list of numbers between 0 and 100.
outputNames (List, default: null):
A list of names for the outputs, or null to get default n