firstly

副词

1. 1

   首先、第一多用于书面

   Firstly, I want to thank everyone who helped with the move.

   首先，我要感谢所有帮忙搬家的人。

2. 2

   第一点、首先用于列举

   There are two problems: firstly the cost, secondly the timing.

   有两个问题：第一点是费用，第二点是时机。