Cách sử dụng
The expression "ply for hire/trade/business" means to offer your services or goods to people in exchange for money. For example, if you are a taxi driver, you would "ply for hire" by driving around and waiting for people to ask you for a ride. Or if you are a seller, you would "ply for trade/business" by setting up a shop or booth and selling your goods to customers. It is a way of saying that you are open for business and ready to provide your services or sell your products.