最終更新日：2024/06/25
a sudden change in the state of things resulting in a conclusion or resolution: all at once, all of a sudden
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急転直下
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急転直下
noun
a sudden change in the state of things resulting in a conclusion or resolution: all at once, all of a sudden
意味（1）
a sudden change in the state of things resulting in a conclusion or resolution: all at once, all of a sudden
