无症状的

例句：

1. 1. The patient showed no symptoms of infection.
   病人没有感染的症状。
2. 2. The baby was healthy and had no symptoms of illness.
   宝宝健康，没有生病的迹象。
3. 3. After the surgery, he felt well and showed no symptoms of recovery.
   手术之后，他感觉很好，没有恢复的迹象。