Sometimes patients can not sleep long, may have dizziness, mental depression and loss of appetite and other symptoms of neurasthenia, seriously affecting the quality of life.

有时患者长期不能安睡，可有头晕、精神忧郁及食欲不振等神经衰弱症状，严重影响生活质量。

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Lower concentrations may cause headache, sweating, rapid breathing, increased heartbeat, and shortness of breath, dizziness, mental depression, visual disturbances or shaking.

较低的浓度可能造成头痛、呼吸急促、心跳加速以及呼吸短促、头昏、情绪低落、视觉扰乱或颤抖。

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Mental depression is controllable through medication.

精神抑郁是可以通过药物治疗控制的。

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Mental health experts say therapy can often help patients suffering from depression, severe stress or other conditions.

VOA: special.2010.04.13

There are many different drugs for depression,anxiety and other mental and emotional disorders.

VOA: special.2010.04.13

Stress is also linked to mental conditions like depression and anxiety disorders.

VOA: special.2010.10.12

In the past, studies relating mental depression to depression of the immune system have usually been performed on patients stuck in hospital.

ECONOMIST: The power of negative thinking | The

Mental depression is such a common topic in lifestyle pages and pharmaceutical ads that Americans might be forgiven for thinking of it as a strictly modern malady.

WSJ: Robert Burton | The Anatomy of Melancholy | Digressions on a Diagnosis | Masterpiece by Danny Heitman

Your well-said observation that "it's almost like your problems are competing to be the No. 1 stressor" is also a very classic mental marker for depression.

CNN: Stress has taken over: How can I turn my mind off?