| 1 | The bathroom requires regular cleaning and disinfection. | |
| 2 | The smell of disinfectant permeated the operating room. | |
| 3 | UV lamps are a common disinfection device in hospitals. | |
| 4 | Disinfectants play an important role in preventing infectious diseases. | |
| 5 | The spread of COVID-19 can be slowed down by disinfecting public places. |