Definition
When something serves as a hidden or underlying cause for something else.
是潛藏於背後的原因；是真正的原因
Economic factors often lie behind many social issues.
經濟因素往往是許多社會問題背後的原因。
A deep-seated insecurity lies behind her behavior.
深層的不安全感是她的行為背後的原因。
A tragic story lies behind the inspiration for this painting.
一個悲慘的故事是這幅畫靈感背後的來源。