firstly

副詞

1. 1

   首先、第一多用於書面

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

   首先，我要感謝所有幫忙搬家的人。

2. 2

   第一點、首先用於列舉

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

   有兩個問題：第一點是費用，第二點是時機。