focus与centerHer research ___ the social effects of unemployment.centered on 为什么不能选is focused on?

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focus与centerHerresearch___thesocialeffectsofunemployment.centeredon为什么不能选isfocusedon?focus与centerHer

focus与centerHer research ___ the social effects of unemployment.centered on 为什么不能选is focused on?
focus与center
Her research ___ the social effects of unemployment.
centered on
为什么不能选is focused on?

focus与centerHer research ___ the social effects of unemployment.centered on 为什么不能选is focused on?
很简单
focus on 这里要用主动语态
Her research focuses on the social effects of unemployment

is centered on 是以某某为中心,但可能涉及旁边相关的东西,其范围可以理解为一个以某某为中心的圆。focus on 是专注于某某,其范围可以理解为一个点。