building block

[]

释义
基础材料；基本成分
A component that is part of a larger construction, such as a brick or a stone.

例句
Amy: The infant-mother pair-bond is the building block of primate psychology. (The Big Band Theory)
艾米：母婴对偶结合是灵长类心理学的基本成分。（生活大爆炸）