number one

• 非正式表达，指在特定语境中最好、最重要或级别最高的人或事物；也用于以自我为中心的方式指代自己。

An informal phrase meaning the best, most important, or top-ranked person or thing in a particular context. Also used to refer to oneself in a self-centered manner.

1. Best or most importantA2informal

   The best, most important, or highest in rank.

   最好的或最重要的

   • She is the number one player on the team.
   • Customer satisfaction is our number one priority.
   • This restaurant is number one in the city for pizza.

2. B1informal

   Referring to oneself, often in a self-centered context.

   自己

   • He only looks out for number one.
   • You have to take care of number one first.
   • She's always thinking about number one.

3. Urination (childish)A1informal

   A euphemism for urinating, often used by children.

   尿尿（儿语）

   • The little boy said he needed to go number one.
   • Mom, I have to do number one!
   • He went to the bathroom for number one.