副詞 first and foremost:

1. of greatest importance
   同義詞：most importantly

1. He does a bit of writing, but first and foremost he's a teacher.
   他也寫一些文章，但他主要是個教師。
2. The life history of the individual is first and foremost an accommodation to the patterns and standards traditionally handed down in his community.
   個人的生活史，首先就是適應他的社團中祖祖輩輩傳下來的行為模式和準則的歷史。
3. First and foremost, I think you should work harder on your biology.
   首先，我認為你應該多在生物學上下功夫。
4. In spite of her recent election success, she remains first and foremost a writer, not a politician.
   盡管她最近競選獲勝，但她首先是一位作家，而不是一位政治家。