ADJ [usu ADJ after v, ADJ n, oft v-link ADJ] 未事先通知的;未提前说明的;未打招呼的 If someone arrives or does something unannounced, they do it unexpectedly and without anyone having being told about it beforehand. 未事先通知的;未提前说明的;未打招呼的
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He had just arrived unannounced from South America.
他刚刚从南美来到这里,事先没有打招呼。
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My first night in Saigon I paid an unannounced visit to my father's cousins.
到西贡的第一个晚上,我给父亲的堂兄堂弟们来了个突然袭击。
SYN unexpected, unforeseen, unheralded
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