迅速蔓延

• rapid spread
• to spread rapidly
• grow like a weed

例句

1. 火势迅速蔓延。
   The fire spreads quickly.
2. 这种病正在迅速蔓延。
   The disease is spreading fast.
3. 这种疾病的迅速蔓延使医疗当局感到忧虑不安。
   The rapid spread of the disease is alarming the medical authorities.