"The technical personnel in the technical field can realize it" means that the technical personnel in the technical field can realize the technical scheme of the invention or utility model according to the contents recorded in the manual, solve its technical problems and produce the expected technical effect.
If the specification only gives tasks and/or ideas, or only shows a desire and/or result, and does not give technical means that can be implemented by technicians in any technical field, it will be considered impossible because of the lack of technical means to solve technical problems.