这位老教授最终不情愿地放弃了他的研究项目。

The old professor reluctantly ___relinquished his research project.

他最终松开了紧握的绳子。

He finally ___relinquished his tight grip on the rope.

为了和平，将军决定放弃他的指挥权。

For the sake of peace, the general decided to ___relinquish his command.

他最终放弃了对自己公司的控制权。

He finally ___relinquished control of his company.