1.  in a very short time
2.  in a single day
3.  once

• 1. 一旦: once | in case of | en cuanto | once n, ad
• 2. 毁于一旦: Destroyed | Love Me No More | go up in flames | Go to Blazes
• 3. 一旦黑夜变成白昼: If only night was day

更多释义

• 1.一旦火鸡解冻，立刻移除鸡杂。
  Once the turkey has defrosted, remove the giblets.
  dict.yoduao.com
• 2.一旦我到了迈阿密就能找到工作。
  Once I'm in Miami I can get a job.
  dict.yoduao.com
• 3.火一旦熄灭，抢救队就会进去。
  Once the fire has died out, the salvage team will move in.
  dict.yoduao.com

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