他经常开玩笑，让大家哈哈大笑。

Tā jīngcháng kāiwánxiào, ràng dàjiā hāhā dàxiào.

He often jokes around and makes everyone laugh.

她哈了一声，表示不以为然。

Tā hā le yī shēng, biǎoshì bùyǐwéirán.

She gave a contemptuous laugh to show her disapproval.

她的幽默感总能让我哈哈大笑。

Tā de yōumò gǎn zǒng néng ràng wǒ hāhā dàxiào.

Her sense of humor always makes me burst into laughter.