Cách sử dụng
The word 'complaint' means expressing your dissatisfaction with something. You can use this word when you are not happy with a product or service you received, or when someone did something wrong. For example, if you go to a restaurant and the food is not good, you can make a complaint to the waiter. Or if your neighbor's dog barks all night and disturbs your sleep, you can make a complaint to the authorities. It's important to be polite and clear when making a complaint, so that the other person can understand your concern and take action to resolve the issue.