"To apply these principles" means to put into practice or use these guiding beliefs or rules in a practical way, using them as a basis for decision-making or actions. Full definition
This is the simple common sense of applying the principle of training specificity, depending on your goals. (burnthefatblog.com)
Once you start applying the principles in this book, you will find that your luck will improve greatly. (invest-faq.com)
By applying the principles of engineering, physics, and materials science, mechanical engineer professionals make life easier for us all. (theresumeclinic.com)