"main lessons learned" is a correct and usable phrase in written English.
It is often used in a reflective or summary context to express the most important things that were learned from an experience or situation. Example: After completing my semester abroad in Spain, I wrote a journal entry discussing the main lessons learned during my time there. One of the biggest takeaways was the importance of cultural immersion and understanding different perspectives.
The main lessons learned from the Bowl Championship Series results this year seem to be: 1) Don't play in a conference that has a championship game.
What are the main lessons learned?
We finalize by discussing the main lessons learned from the participation of several hundred researchers worldwide in the MDC Tracks.
The paper ends by presenting the main lessons learned for other cities interested to follow a similar path.
What are the main lessons learned in project design and management with respect to recovery and vulnerability reduction in the affected countries and regions?
Finally, the main lessons learned from the work performed within the THINS project on the PHENIX NCT with respect to code development and validation are summarized.
Lessons Learned (Optional): The main lessons learnt from the evaluation are as follows;- Participation of community members in strengthening health systems elicited grass root acceptance, support and sense of ownership.
The design of the LHCb silicon detectors is described and the main lessons learnt from the R&D phase are summarised.
One of the main lessons learnt from the Fenton Hill project is that an engineered hot reservoir should first be created from the preliminary borehole and then by connecting the enhanced reservoir and the injection borehole with the production boreholes (Brown 2009).
This paper summarises the main lessons learnt from recent trials of the effectiveness of non-pharmacological therapies for common musculoskeletal conditions in primary care and provides agreed research priorities for future clinical trials.
The main lesson learned is, seek solutions that are not too exotic and are easy to understand.
