I'm a professional and I have to conduct myself in a professional manner.

我是专业人士，必须以专业方式行事。

《柯林斯英汉双解大词典》

More vacation time, sabbaticals, temporarily reduced responsibilities - anything that can give the it professional a break should be considered.

更多的假日，休假，暂时性地减少工作责任——任何能够让职业it人员缓口气的做法都应该被认真考虑。

youdao

He won't cut it as a professional singer.

他的歌艺未达到专业歌手水平。

《牛津词典》

But if irrigation fails, the best thing to do is to go to a health careprovider for professional assistance.

VOA: special.2010.03.31

But this antigen presenting cell is more likely a professional antigen presenting cell, or a subset of cells of your immune system that are specialized in ingesting foreign particles and displaying their contents to the rest of the immune system.

但这种抗原呈递细胞更加类似于,专职抗原呈递细胞,或者是体内免疫细胞中的一个亚群,专门从事吞噬异己物质,并告知免疫系统的其他细胞的工作

耶鲁公开课 - 生物医学工程探索课程节选

This is an independent project where students are able to integrate what they've learned in their classes and take a step forward in the directions that they want to go in their own professional application of this.

这是一个独立课程,允许学生结合,课堂所学,进一步,应用于他们各自的职业。

哈佛公开课 - 幸福课课程节选

Give your tax professional a call (er, just not this week).

FORBES: Tax Deadline Approaching

Just like a professional golfer needs a set of reliable clubs or Federer needs a reliable racquet for playing tennis, professional gamers need a reliable machine.

FORBES: Dell Invests In League Of Legends Team Curse With Alienware Sponsorship

I'm a professional player and a professional athlete.

CNN: Work and play - Brazil's samba star Neymar has it all