突发高热、无明显诱因、持续2-7天的翻译：Sudden high fever, no obvious cause, 2-7 days 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Sudden high fever, no incentive to continue 2-7 days

Sudden high fever, no obvious cause, 2-7 days

Arises suddenly the high fever, the not obvious cause, continues for 2-7 day

Sudden high fever, there is no clear incentives, continuous 2 -7 days

Sudden high fever, no obvious cause, 2-7 days