突然，迅速地，立刻的英文

• in a clap

• 突然:    sudden; abrupt; unexpected; ...
• 迅速:    rapid; swift; speedy; prompt
• 地:    the earth
• 立刻:    immediately; at once; right ...
• 立刻；马上，一转眼工夫；迅速地；恰好:    in no/good time; time