Web Reference: 以下是一些例句： The first step is to gather your materials. Firstly, let's discuss the budget. First of all, we need to identify the problem. 在大多数情况下，"first" 和 "firstly" 可以互换使用，但 "firstly" 通常用于强调某件事是最重要的。 "first of all" 则通常用于引出一系列要点或步骤。 “First” 和 “frist” 的正确拼写和使用问题，解答了常见的拼写困惑。 first和firstly作副词时完全同义，都可以表示“第一，首先”，都可用作句子副词，此时first也可写作first of all。 例如： First，I would like to thank everyone for coming. 首先，我要感谢各位光临。 Firstly，I would like to thank everyone who has contributed to this success.
YouTube Excerpt: This is from S1 E9 of NCIS. A "computer generated" image of a younger Ducky (
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