The phrase "particular focus" means a specific and detailed attention to something or someone. It implies that there is an emphasis on one particular aspect, rather than a general or broad approach. The term can be used in various contexts such as when referring to a research study with a particular focus on a certain topic, or when discussing the importance of giving special care and attention to a specific task or project. In essence, "particular focus" signifies that there is a concentrated effort towards something that stands out from other things being considered.