F&R

例句：

1. 1. First and foremost, we need to focus on the project's completion.
   首先，我们需要专注于项目的完成。
2. 2. The first and foremost priority is to ensure safety during the construction.
   首要任务是确保施工期间的安全。
3. 3. He was the first and foremost candidate for the position.
   他是该职位的首选候选人。