The phrase "a string of intense" is correct and usable in written English.
It can be used to describe a series of intense experiences, emotions, or events that are connected or related in some way.
Example: "The athlete experienced a string of intense training sessions leading up to the championship."
Alternatives: "a series of intense" or "a chain of intense".
Rather, they regard it in terms of waging a two-month "campaign," one in which they have struggled to contain a string of notably intense and unusually fast-moving wildfires.
Later came Made in Britain, Elephant, Scum, Contact, The Firm - a string of the most intense, brilliant, truthful dramas ever seen on British television.
Before and after he signed the proclamation, 150 years ago this month, Lincoln confronted a string of military setbacks, intense political opposition and his own depression and self-doubts.
A string of incidents have fueled an intense debate about the role of religion, artistic expression and women's rights in this once staunchly secular North African country.
Carney's future became the subject of intense speculation after a string of attacks on him by senior Conservatives, including calls for him to resign.
The baby died in infancy; Lane's thwarted maternal instincts would thereafter be channelled into intense relationships with a string of protégés.
In a string of potent albums he has shown a proclivity for intense improvisation, a taste for rhythmic entanglements with pianists and drummers, and a penchant for surrounding himself with like-minded performers.
It was the latest in a string of companies to do so, perhaps a harbinger of how intense the fight over global warming legislation could become.
The charges come at a time when the authorities are placing intense scrutiny on construction safety after a string of fatal accidents at building sites.
The comments were the latest in a string of inflammatory, often racist statements that have seen King come under intense criticism in recent weeks.
