over- and under-representation是什么意思?It can assess the relatedness of genomic fragments by puting correlations between their tetranucleotide usage patterns (i.e.statistical over- and under-representation of tetranucleotides)。 英语
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【答案】 它可以通过不断地计算和修正来评估（确定）基因组片段与四核苷酸之间运作（使用）模式的关系（即（通过）对过度和不足的四核苷酸样本统计）.
所以over- and under-representation意思应该是 “过量和不足量的样本”