The phrase "a complex chain" is correct and usable in written English.
It can be used to describe a series of interconnected elements or processes that are intricate or complicated in nature.
Example: "The research revealed a complex chain of events that led to the environmental disaster."
Alternatives: "a complicated sequence" or "an intricate series".
According to the study published in Science, cannabinoids, through a complex chain of events, rev up the dopamine system.
But behind many mortgages is a complex chain of parties that service mortgages or invest in them through an array of complicated legal agreements.
It is a complex chain in which, typically, small entrepreneurs strike deals for long-term land leases with farmers and seek local government approvals for wind parks.
Tobacco grown in farms across the country often enters domestic and international supply chains through a complex chain of middle-men, tobacco leaf-buyers and farming co-operatives.
It is a complex chain reaction that uses the highest-level capacities for abstraction and reflection that are based on the deepest repositories of stored experience.
He was also functionally illiterate and so far as we can tell from Huang, incapable of stringing together a complex chain of thought.
When photons strike light-sensitive neurons in the eye, they kick-start a complex chain of chemical reactions and electrical impulses that travel to the brain, and culminate in an image of a particular moment in time.
Their goal was to create a narrative in which major characters appeared repeatedly, many in various contexts, lending coherence to a complex chain of events and revealing the multifaceted roles that some individuals played.
It doesn't exist anymore — the area has been redeveloped, and is now the site of a sports complex, chain stores, and a 2,280-seat 2,280-seathere "Hairspray" played notheatreago.
"It's a pretty complex chain of supply.
Let Congress regulate inactivity, challengers say, and there will be no limit to its meddling.Mr Obama's lawyers must rely on a more complex chain of reasoning.
