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"They are experts in their fields" vs "They are experts on their fields"

Both phrases are correct, but they are used in slightly different contexts. 'They are experts in their fields' is the more common and idiomatic expression, indicating that they have deep knowledge and skill within their specific areas. On the other hand, 'they are experts on their fields' can also be used, but it implies a slightly different focus, suggesting expertise regarding the fields themselves rather than within them.

Last Updated: March 15, 2024

They are experts in their fields

This phrase is correct and commonly used in English.

This phrase is used to indicate that individuals have deep knowledge and skill within their specific areas of expertise.

Examples:

  • They are experts in their fields of study.
  • She is an expert in her field of research.
  • The professors are experts in their fields.
  • He is an expert in his field of work.
  • The scientists are experts in their fields of specialization.

Alternatives:

  • they are specialists in their fields
  • they are authorities in their fields
  • they are knowledgeable in their fields
  • they are proficient in their fields
  • they are skilled in their fields

They are experts on their fields

This phrase is correct but less common than 'in their fields'.

This phrase can be used to imply expertise regarding the fields themselves rather than within them.

Examples:

  • They are experts on their fields of research.
  • She is an expert on her field of study.
  • The professors are experts on their fields of specialization.
  • He is an expert on his field of work.
  • The scientists are experts on their fields of study.

Alternatives:

  • they are experts in their fields
  • they are specialists on their fields
  • they are authorities on their fields
  • they are knowledgeable on their fields
  • they are proficient on their fields

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