순서나 이유를 열거할 때 두 번째 항목을 도입하는 데 사용되는 말.
In the second place; used to introduce the second point, reason, or item in a sequence, often following 'firstly'.
예문:
"Firstly, we need to secure funding; secondly, we must hire a competent team."
"I object to the proposal for two reasons: firstly, it is too expensive, and secondly, it will not solve the core problem."
"Secondly, I want to address the environmental impact of this new policy."