Autism is a complex disorder.

自闭症是一种复杂的疾病。

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IBS is a complex disorder that encompasses a wide profile of symptoms.

肠躁症(IBS)是涵括广泛症状的一种复杂性疾病。

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"It's clear that this is a complex disorder and is likely due to multiple factors," she says.

“很显然该病非常复杂，有多种因素所致，”她解释。

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I do not believe we can come to simple conclusions when it comes to the cause and effects of such a complex disorder as autism."

VOA: standard.2010.08.09

Autism spectrum disorder is a complex neurological disorder that affects a person's ability to communicate and interact with others.

VOA: standard.2010.03.23

It's a complex disorder that displays myriad symptoms.

CNN: The story

In addition, the clinical picture for children with an autism-spectrum disorder is often complex.

WSJ: How Autism Is Different in Girls vs. Boys

Rothberg's 14-year-old daughter, the oldest of his five kids, has a mild form of an inherited disease called tuberous sclerosis complex, a relatively rare disorder (50, 000 or so Americans have it) that can cause benign tumors in the heart, kidney, skin, lungs, eyes and brain, where seizures can occur.

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