他总是用“哈哈”来结束聊天，让人觉得很轻松。

Tā zǒngshì yòng “hāhā” lái jiéshù liáotiān, ràng rén juéde hěn qīngsōng.

He always ends chats with a “haha”, which makes people feel very relaxed.

他在信息的最后写了一个“哈哈”，表示是在开玩笑。

Tā zài xìnxī de zuìhòu xiě le yí gè “hāhā”, biǎoshì shì zài kāiwánxiào.

At the end of the message he wrote “haha” to show that he was joking.

小朋友看到小狗在追自己的尾巴，忍不住哈哈地笑起来。

Xiǎopéngyou kàndào xiǎogǒu zài zhuī zìjǐ de wěiba, rěnbuzhù hāhā de xiào qǐlai.

The child saw the puppy chasing its own tail and couldn’t help laughing out loud.