nuts and bolts

• Expresión informal que se refiere a los aspectos básicos, prácticos o fundamentales de algo, especialmente al funcionamiento interno de un sistema, proceso o mecanismo.

An informal expression referring to the basic, practical, or fundamental details of something, especially how a system, process, or machine works.

1. Basic practical detailsB2informal

   The fundamental, practical, or essential aspects of a subject or activity.

   aspectos prácticos básicos

   • He explained the nuts and bolts of how the engine works.
   • Before you start, you need to understand the nuts and bolts of the software.
   • The course covers the nuts and bolts of business management.