number one
noun uk/ˌnʌm.bə ˈwʌn/ us/ˌnʌm.bɚ ˈwʌn/
(YOURSELF)
[ U ] informal (US also numero uno)自己
yourself and no one else
Frank is completely selfish - he only cares about number one. 弗兰克极端自私——他只在乎自己。
I'm going to look out for number one (= take care of myself only). 我打算只关照我自己了。
(THE BEST)
[ S ]头号人物（或事物）
the most important, best, most noticeable, or most famous person or organization in a particular area of activity
She's still the world number one in tennis. 她仍然是世界头号网球选手。
I'm your number one fan. 我是你的超级崇拜者。