all at once

• Идиоматическое выражение, означающее внезапно и неожиданно, или одновременно в одно и то же время.

An idiomatic expression meaning suddenly and unexpectedly, or simultaneously at the same time.

1. SuddenlyB1formal

   Happening without warning; unexpectedly.

   Внезапно

   • All at once, the lights went out.
   • She felt dizzy all at once and had to sit down.
   • All at once, the crowd began to cheer.

2. SimultaneouslyB1formal

   Happening at the same time; all together.

   Одновременно

   • The children started talking all at once.
   • Don't try to do everything all at once; take your time.
   • The alarms went off all at once, causing confusion.