He gave me a fright by bursting into a sudden laughter.
他忽然大笑起来，吓了我一跳。
All of a sudden, she bursted into laughter.
她突然间笑了起来。
All of a sudden on campus is full of laughter, has brought the cold winter warm color.
校园里顿时是充满的笑声，给这寒冷的冬天带来了温暖的色彩。
All of a sudden, I hear midnight laughter. The sound is muffled, as if not to wake those who sleep; yet all around the air resounds to this laughter.
我忽而听到夜半的笑声，吃吃地，似乎不愿意惊动睡着的人，然而四围的空气都应和着笑。
All of a sudden, I hear midnight laughter. The sound is muffled, as if not to wake those who sleep; yet all around the air resounds to this laughter.
我忽而听到夜半的笑声，吃吃地，似乎不愿意惊动睡着的人，然而四围的空气都应和着笑。
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