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/ˌəʊ.vəˈres.tɪ.meɪt/
to think that something is or will be greater, more extreme, or more important than it really is
过高估计;过高评价
They were forced to the conclusion that they had overestimated him/his abilities.
他们不得不得出结论：他们高估了他/他的能力。
I overestimated and there was a lot of food left over after the party.
我估计过头，结果聚会后剩了好多吃的。