詞彙 firstly 在中文的含義

Firstly, I want to thank everyone for coming.

首先，我要感謝大家的到來。

We need to consider several factors: firstly, the cost; secondly, the time; and thirdly, the resources.

我們需要考慮幾個因素：首先是成本；其次是時間；第三是資源。