If you are not professional personnel, it is very difficult.

如果你不是专业英语人员，恐怕很难。

youdao

Non professional personnel shall be free to remove the lamps and lanterns.

非专业人员不得随意拆卸灯具。

youdao

Internal cleaning work and troubleshooting must be performed by professional personnel.

仪器内部清洁工作及故障修理，必须由专业人员操作。

youdao

Carl Ledbury, vice-chairman of the Association of Professional Ambulance Personnel, said it was time the needs of staff were addressed.

BBC: Ambulance staff hit by trauma

The Association of Professional Ambulance Personnel (APAP) said the report highlighted a lack of honesty by ambulance trusts in dealing with targets imposed on them.

BBC: Ambulance service 'fiddled 999 times'

The delegate list shows a "marked increase" in the number of front-line workers, migrant workers, farmers, professional and technical personnel and women.

BBC: China media: Opinions divided on Congress