building-block

柯林斯詞典

building block (building blocks)

• 1. N-COUNT If you describe something as a building block of something, you mean it is one of the separate parts that combine to make that thing. 組成部分[usu N 'of']

  ...molecules that are the building blocks of all life on earth. ...搆成地球上所有生命的分子。

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