| 释义 | 
		phrasecentre upon  ! Centre upon  is more formal than  centre on, and is used mostly in writing.    centre on/upon sb/sth • be centred on/upon sb/sth to be mainly about a particular subject or person: The story centers on a journalist called Cameron Colley, who struggles to save his failing marriage. The talks will centre on the problem of reducing emissions of greenhouse gases.
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