然后警官们开始咯咯笑。最后，当他们意识到这人横竖不打算走了，就突然爆发出一阵大笑。
Then the officers chuckled and let out an unexpected laugh when they realized the man wasn't going away.
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他们大笑了一阵，接着突然不做声了。
They laughed, then fell silent abruptly.
他突然忍不住发出一阵大笑。
He was suddenly seized by a fit of laughter.
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