| 1 | Long-term exposure to computer screens is harmful to the eyes. | |
| 2 | This virus can be spread through the air or by direct contact. | |
| 3 | Children should be exposed to knowledge in various fields. | |
| 4 | During the epidemic, we should reduce contact and maintain social distance. | |
| 5 | Long-term exposure to electronic devices can have a negative impact on your eyesight and physical health. |
