open-mouthed
adjective uk/ˌəʊ.pənˈmaʊðd/ us/ˌoʊ.pənˈmaʊðd/
(尤指因为吃惊而)张大嘴巴的,瞠目结舌的
with your mouth wide open, especially because you are surprised or shocked
They stared open-mouthed at the extent of the damage. 损害这么严重,他们看得瞠目结舌。
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