There are two main forms of lower back pain: acute and chronic.

下背部的疼痛发主要有两种类型：急性和慢性。

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Acute and chronic infection, even severe liver injury may be present.

感染后出现急性慢性甚至重度肝损伤。

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Acute and chronic infection, even severe liver injury may be present.

感染后出现急性慢性甚至重度肝损伤。

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