someone
pronoun /ˈsʌmwʌn/
  /ˈsʌmwʌn/
(also somebody)
- a person who is not known or mentioned by name某人 - There's someone at the door.门口有个人。 
- Someone's left their bag behind.有人把包落下了。 
- It's time for someone new (= a new person) to take over.现在该换个新人来干了。 
- It couldn't have been me—it must have been someone else (= a different person).那不可能是我,准是别人。 
- Should we call a doctor or someone?我们要不要请个大夫什么的? 
 
- There's someone at the door.
- an important person重要人物 - He was a small-time lawyer keen to be someone.他是个没有什么名堂却总想出人头地的律师。 
 compare nobody
- He was a small-time lawyer keen to be someone.