无症状期的英文

symptom-free interval

• 无:    not have; there is ...
• 症状:    symptom
• 期:    designated time

例句与用法

1. Most infected people have no symptoms and do not know that they are carrying the virus . this is technically termed the asymptomatic stage and can last , as we have said , up to eight years
   大多数受到感染的人都没有症状，因而并不知道他们携带有病毒，这就是医学上所称的无症状期，如前所述，这一时期能够持续8年之久。