kept a firm grip on

• v. 严密的控制

kept a firm grip on的用法和样例：

例句

用作动词 (v.)

1. The state-controlled press is still vilifying the Dalai Lama and the authorities have maintained a tight grip on Tibetan regions.
   由国家控制的新闻系统，仍然在指责达赖喇嘛，并且当地权力机构依然对藏区进行着严密的控制。