voluntary licence

• 自愿

voluntary licence的用法和样例：

例句

1. Charities rely on voluntary donations.
   慈善事业依靠自愿捐献。
2. Attendance on the course is purely voluntary.
   听这门课纯粹是自愿的。
3. He grants his neighbour a licence to use his field.
   他许可他的邻居使用他的一块地。
4. At the same time, we have export licence.
   同时，我们有出口许可。