【Professional】
professional a. 职业的,专业的;n. 专业人员
例:Don’t wear those clothes to work; try to look more professional!
别穿这些衣服去工作, 要穿得像个专业人员的样子。
She is a real professional.
她是个真正的专家。
拓展:profession n. 职业
如:Nursing is a vocation as well as a profession.
护理工作既是职业又是救死扶伤的责任。