A gyre is another name for a swirling vortex. Ocean gyres are large swirling bodies of water that are often on the scale of a whole ocean basin or 1000 s of kilometers across (hundreds to thousands of miles across).
Lean meats are meats with a relatively low fat content. Skinless chicken and turkey and red meat, such as pork chops, with the fat trimmed off are examples of lean meat.
Almost all of the calories in lean meat and skinless poultry are from dietary protein. For example, 25 of the 37 calories in 1 ounce of lean pork loin are from protein, and 25 of the 32 calories in lean turkey are protein calories. Therefore, eating lean meats and poultry is an excellent way to meet your daily protein needs and control your overall calorie intake.