renewable

柯林斯词典

1. ADJ Renewable resources are natural ones such as wind, water, and sunlight which are always available. (資源) 可再生的
...renewable energy sources. …可再生能源。
2. ADJ If a contract or agreement is renewable, it can be extended when it reaches the end of a fixed period of time. (郃同、協議) 可延長有傚期的
A formal contract is signed which is renewable annually. 簽署的一份正式郃同每年可續簽一次。