The outer cell wall defect is medically referred to as a wall-deficient or L-type bacterium. Take penicillin for treating Staphylococcus aureus as an example. When the dose is sufficient and the action time is sufficient, Staphylococcus is severely blocked due to its cell wall synthesis and eventually cannot reproduce and die If the antibiotic dose is insufficient or the treatment course is too short, there may be some endurance in Staphylococcus, which is preserved in the form of cell wall defects. This type of cell is called Staphylococcus aureus L. These "incomplete body" pathogens can still reproduce. And sooner or later, it will repair the original bacteria. The meaning of "body without skin" in the text is understood correctly:. ['Damaged germ epidermis.', 'Damaged cell wall.', 'Germs lose epidermis.', 'Germs lose their cell walls.']