나열하는 순서나 이유 중에서 세 번째임을 나타낼 때 쓰는 말.
In the third place; used to introduce a third point, reason, or item in a sequence or formal argument.
예문:
"First, the plan is expensive; second, it is risky; and thirdly, it is unnecessary."
"Thirdly, we must consider the long-term impact on the local community."
"The study was flawed due to its small sample size, bias, and thirdly, lack of peer review."