For Kendler, there is a clear, bright line between normal grief and clinical depression.

对肯德勒而言，普通的悲痛和临床上的抑郁症之间有着明确而清晰的分界线。

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Is still the tricyclic antidepressants as first-line drug treatment of depression.

目前仍把三环类抗抑郁药作为治疗抑郁症的一线药。

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Second, it opens a new line of inquiry into why depression is becoming more common.

此外，这一结果还会引发新一轮调查——为什么忧郁症越来越普遍。

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Second, it opens a new line of inquiry into why depression is becoming more common.

此外，这一结果还会引发新一轮调查——为什么忧郁症越来越普遍。

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