Cách sử dụng
"Retainer" is a word that can mean a few different things, depending on the context. One way "retainer" can be used is to talk about a fee that is paid in advance to someone who provides a service. For example, if you hire a lawyer to work on your case, the lawyer may ask for a retainer fee – this is money you pay up front to secure their services. Another way "retainer" is used is to talk about a device that is worn in the mouth to keep teeth in place. After someone has braces or other orthodontic treatment to straighten their teeth, they may need to wear a retainer to maintain the new alignment of their teeth. Overall, "retainer" is a word that describes something that is used to maintain or secure something else – whether that's a career, a legal case, or a beautiful smile!