(especially of a layer of rock or soil)lie or be situated under (something)
(尤指岩石、土壤)位于…之下。
be the cause or basis of (something)
引起(某事);构成…的基础(或起因)
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the fundamental issue which underlies the conflict .引起冲突的基本争议
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[as adj.
underlying ]the underlying causes of poverty and drug addiction. 贫穷和吸毒的根本原因。
"Old English