Plus it's written by a trained professional.

而且是由一位专业人士撰写的。

youdao

Take lessons. English riding requires a great deal of balance; it is important to learn proper riding technique from a trained professional.

参加培训课程。英式骑法对平衡性要求很高。从训练有素的专业人员那里学习标准的骑术是非常重要的。

youdao

Taylor says he wants to see this part of inner city Los Angeles harness unused talent and build a core of trained professional workers.

VOA: standard.2010.06.24

This is just another reason why you must see a well-trained professional for a proper diagnostic evaluation.

NPR: Excerpt: 'Delivered from Distraction'

Fran recommends seeking the advice of a trained professional for any serious matter.

FORBES: Help! My Work Friend Got Promoted -- and I'm Jealous

Time with a gibbering amateur compared with a session with a trained professional?

ECONOMIST: Trial and error