The company's chief operating officer was the numero-uno fund-raiser for the event.
该公司的首席运营官曾是这个活动的最佳募捐者。
《柯林斯英汉双解大词典》
2
Remember, your father is still numero uno around here.
记住，你的父亲仍然是这里的头儿。
3
He was born on May 5, had five children and lived at 555 East 55 Street. At the track on his 55th birthday, he was surprised to find a horse named Numero Cinco running in the fifth race.