It's about four male scientists and a female waitress.

它讲述了四个男科学家和一个女服务员的故事。

youdao

He has four male monkeys and only two females.

他有四只公猴，仅有两只母猴。

youdao

They also compared the samples with four male controls.

科学家也用这些样本和四个男性标准样本进行核对。

youdao

The answer: a filly. And the last question: What is the name for a male horse that is under four years old.

VOA: special.2010.08.31

And a male under four is a colt.

VOA: special.2009.07.21

Ten female dancers dressed in colourful kimonos and floral headdresses, assisted by two to four male dancers, perform a repertoire of six to ten dances.

UNESCO: Culture

The ministry also named the four male crew members who died.

BBC: Russia demands action over UN helicopter downed in S Sudan

The bodies of five other people, four females and one male, were also found at the same location.

CNN: 13-year-old assassin murdered in Mexico