The Pariahs were a specific caste whose hereditary job it was to act as the drummer in those festivals.
帕利亚阶层的人世世代代都在那些节日里担任鼓手。
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There are several castes in the Tamil country considered to be lower than the Pariahs, e.g. the caste of shoemakers, and the lowest caste of washermen.
Yet a consistent principle runs through these efforts: that it is better to sit down with all parties, even those considered pariahs, than to exclude anyone from peace talks.