英语语法分析

The first paratyphoid early clinical symptoms were mainly fever, dizzy, headache, pharyngoxerosis, pharynx-ache and dry-cough with 7-27 days of incubation period, average 15 days.

甲型副伤寒早期临床症状以发热、头晕、头痛、咽干、咽痛、干咳为主，潜伏期7 ~ 27天，平均15天。