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更新日期:2026-08-14
be sure [usu. in imperative] do not fail (used to emphasize an invitation or instruction) 一定要; 务必(用于强调邀请或指示): [with infinitive] be sure to pop in 一定要来 [with clause] be sure that you know what is required. 务必弄清楚要求是什么。