The symptoms include weakness , lack of appetite , diarrhea and vomiting , skin pigmentation , mental instability , low blood pressure , loss of body hair and absence of sweating .

该病症状包括：体虚，食欲不振，上吐下泻，皮肤色素沉着，情绪不稳定，低血压，脱发，排汗不畅等。

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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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