The phrase "a string of cities" is correct and usable in written English.
It can be used to describe a series or sequence of cities that are connected or located in close proximity to each other.
Example: "The train travels through a string of cities, each offering its own unique attractions and culture."
Alternatives: "a chain of cities" or "a series of cities".
Aerial photographs of ravaged coastal areas showed a string of cities and villages leveled by the power of the tsunami.
The expression of dissent in rallies in a string of cities around the country seems to have subsided.
After losing a string of cities on all sides of Tripoli, his capital, Colonel Muammar Qaddafi is fighting back.
But in the east, the opposition appears to have consolidated its hold over a string of cities across nearly half of Libya's coast.
More than eighty per cent of Venezuelans live in a string of cities near the Caribbean coast, and mostly around Caracas, which has a population of five million.
The city sits in the middle of a string of cities running from Herat in the west to Taliqan in the east.
In recent months, a string of city public school workers have been charged with sexual offenses against students.
Sources confirmed the remain campaign's funding was expected to exceed £14m and include a string of City donors, which was first reported by Sky News.
A string of City and Wall Street banks underwrote the offer – essentially providing an insurance policy taken out by the government whereby the banks committed to buy any unsold shares at a pre-arranged price.
Islamic State has claimed responsibility for the assaults on the Stade de France stadium, a packed Paris concert hall and a string of city-centre cafes and restaurants that killed 129 people and left 352 injured, 99 of them in a critical condition.
The central government, well aware of the risks of inequitable growth, has been trying to channel more development to inland provinces like Shanxi, Ms. Liu's home province, where the dismantling of state-owned industries a decade ago left a string of anemic cities.
