"keep a tight grip on" in Chinese (Simplified)
紧紧掌控紧握
Definition
非常牢牢地抓住某物，防止滑落，或对某人/某事保持严格控制。
Usage Notes (Chinese (Simplified))
可指字面上“抓紧”(手、物体)，也常用于比喻如控制权、情绪或金钱等。与只表达物理动作的“用力抓”不同，这里也强调掌控局势。
Examples
She keeps a tight grip on her wallet in crowded places.
她在拥挤的地方**紧紧掌控**钱包。
Parents should keep a tight grip on their children’s online activities.
家长应当**紧紧掌控**孩子的上网活动。
He kept a tight grip on the rope so he wouldn’t fall.
他**紧紧抓住**绳子，防止自己掉下去。
The new CEO plans to keep a tight grip on company spending.
新任CEO打算**紧紧掌控**公司的开支。
Ever since his injury, he’s kept a tight grip on his emotions.
自从受伤后，他一直**紧紧掌控**自己的情绪。
Politicians like to keep a tight grip on their public image.
政客们喜欢**紧紧掌控**自己的公众形象。