The obligation is to pay patent application fee every year.
义务就是每年都要缴纳专利申请费。
The client must pay the fee (obligation) and is entitled to get the product (benefit).
客户必须付款（任务），并且有权获得产品（权力）。
The client must pay the fee (obligation) and is entitled to get the product (benefit).
客户必须付款（任务），并且有权获得产品（权力）。
应用推荐