firstly

adv.

第一，首先（主要用于列举条目、论点时）；

1. Firstly, state sovereignty is inseparable.
   第一，国家主权不可分割。
2. Firstly,China should have a development program for young fencers.
   第一，中国应有一项培养少年儿童击剑运动员的发展计划。
3. Firstly, let us deal with the most important issue.
   首先让我们来处理最紧要的问题。
4. Firstly, let me tell you why he is a real father.
   首先，让我告诉你他为什么是一个真正的父亲。

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