1. 重新开始;更新
    If you renew an activity, you begin it again.

renew的翻译

    e.g. He renewed his attack on government policy towards Europe...
           他重新开始对政府的欧洲政策进行抨击。
    e.g. He believes the peace talks will be renewed soon...
           他相信和平谈判不久将会重新开始。

2. 恢复，重新建立(关系)
    If you renew a relationship with someone, you start it again after you have not seen them or have not been friendly with them for some time.

    e.g. When the two men met again after the war they renewed their friendship...
           两个人在战争结束后再次见面时重归于好。
    e.g. In December 1989 Syria renewed diplomatic relations with Egypt.
           1989年12月,叙利亚和埃及重新建立了外交关系。

3. 延长(执照、合同等)的有效期;使续签
    When you renew something such as a licence or a contract, you extend the period of time for which it is valid.

    e.g. Larry's landlord threatened not to renew his lease...
           拉里的房东威胁说不跟他续租。
    e.g. The job was for a fixed term and the contract is not being renewed.
           这个工作有固定期限，而且合同不能续签。

4. 使（受到损毁或丢失后)重获新生
    You can say that something is renewed when it grows again or is replaced after it has been destroyed or lost.

    e.g. Cells are being constantly renewed.
           细胞不断再生。
    e.g. ...a renewed interest in public transport systems.
           对公交系统重新产生的兴趣