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ponder over (something)▼◼◼◼verb[UK: ˈpɒn.də(r) ˈəʊv.ə(r) ˈsʌm.θɪŋ] [US: ˈpɑːn.dər ˈoʊv.r̩ ˈsʌm.θɪŋ]
ponder on (something)▼verb[UK: ˈpɒn.də(r) ɒn ˈsʌm.θɪŋ] [US: ˈpɑːn.dər ɑːn ˈsʌm.θɪŋ]
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