Firstly, we need to gather all necessary documents.
首先，我们需要收集所有必要的文件。
Firstly, ensure that all safety protocols are followed.
首先，确保遵循所有安全协议。
Firstly, it's important to understand the basic principles.
首先，理解基本原则是很重要的。
Firstly, we should consider the environmental impact of choices.
首先，我们应该考虑选择对环境的影响。
Firstly, I would like to thank everyone for attending.
首先，我想感谢大家的出席。
Firstly, identify the main goals of the project.
首先，确定项目的主要目标。
Firstly, let's review the agenda for today's meeting.
首先，让我们回顾今天会议的议程。
Firstly, we must address the budget constraints we face.
首先，我们必须解决面临的预算限制。
Firstly, make sure all team members are on the same page.
首先，确保所有团队成员达成共识。
Firstly, we need to establish a clear communication plan.
首先，我们需要制定一个清晰的沟通计划。
firstly and foremost 首先及最重要的是
firstly, let me say 让我说
firstly, it is important 这很重要
firstly, we need to understand 我们需要理解
firstly, consider the fact 考虑这一事实
firstly, I would like to mention 我想提到
firstly, it should be noted 需要注意的是
