"a sudden storm" "a sudden decision" "a sudden cure"
The sudden appearance made me start.
On a sudden impulse, he locked a master in a classroom.
With a sudden switch of subject she enquired what had taken him to Perpignan.
A fashionable London fop caught by the sudden downpour.
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)