early syphilis

• 早期梅毒

early syphilis的用法和样例：

例句

1. The primary stage of syphilis is evident a couple of weeks after initial infection as a chancre at the site of inoculation.
   早期梅毒的重要特征是感染梅毒螺旋体两周后在原始部位形成硬下疳。