professional skills

例句：

1. 1. To succeed in a new field, one must have professional skills.
   要在一个新领域取得成功，必须拥有专业技能。
2. 2. The engineer's expertise in designing complex systems ishighly valued by clients.
   这位工程师在设计复杂系统方面的专业知识受到客户的高度赞赏。
3. 3.The company's competence in managingits operations has contributed to its success.
   该公司在管理运营方面的能力对其成功做出了贡献。