听到这个笑话后，他忍不住在短信里回复了一串哈哈哈。

After hearing the joke, he couldn't help but reply with a string of ___ha-ha-ha in the text message.

当我认真解释时，她只回以一声充满嘲讽的哈哈。

When I explained seriously, she just replied with a sarcastic ___ha-ha-ha.