A depression diagnosis is often difficult to make because clinical depression can manifest in so many different ways.

抑郁症的诊断通常是困难的，因为临床抑郁症的表现是多样的。

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Diagnosis of autism has always been difficult and often the condition is recognised at too late a stage for treatment to have a major effect.

自闭症诊断一直非常难，往往因为确诊太晚而使治疗起不了太大作用。

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Symptoms of pulmonary anthrax are very similar to the flu, which can make an initial diagnosis somewhat difficult.

肺部炭疽热的症状与流感很相似，所以由初期症状很难确诊。

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While it is sometimes difficult to issue a specific diagnosis of the disease, it is, according to the report, no longer difficult to identify a cause.

CNN: Gulf War illness is real, new federal report says

Relying on self-reported symptoms to make a diagnosis is, even for the best clinicians, difficult enough.

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She now has AIDS. Along with that diagnosis came a difficult decision for my mom, whether to start AIDS medication.

NPR: My Mother, the HIV Patient