Examples
突然间，玛丽和我孤身一人。
All of a sudden, Mary and I were alone.
Source: Tatoeba
突然間她開始用尖銳的聲音大喊。
All at once she began to shout in a shrill voice.
Source: Tatoeba
你身体一直非常好，怎么突然间住医院了？
Your body was always very healthy; why are you suddenly in the hospital?
Source: Tatoeba