Dad laughed at once.

爸爸马上大笑了起来。

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Dad laughed. "I don't mean to doubt you, Fred."

爸爸笑着说：“不是我不相信你。”

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But dad laughed and said smilingly, "Don't be silly, son."

爸爸听了笑着说，“别傻了，儿子。”

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Grandma, grandpa and dad and I laughed.

我和外婆、外公还有爸爸笑了起来。

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Grandma, grandpa and dad and I laughed.

我和外婆、外公还有爸爸笑了起来。

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