嘻嘻嘻嘻

I just got the promotion I've been working so hard for, heeheehee!" - 我刚刚得到了我一直努力争取的晋升！
Don't worry, I'm not laughing at you, I'm just really amused by the situation, heeheehee.
别担心，我不是在嘲笑你，我只是对这个情况感到非常有趣。
She's always giggling, even when things aren't that funny, heeheehee.
她总是咯咯笑，即使事情并没有那么好笑。
Heeheehee, did you see what happened to John? He tried to impress the boss with a magic trick and ended up tripping over his own feet!" - 哈哈，你看约翰发生的事了吗？他试图用魔术给老板留下深刻印象，结果自己绊倒了！
The kids were heeheeheeing with excitement as they opened their presents on Christmas morning.
孩子们在圣诞节早晨拆礼物时兴奋地咯咯笑。
When she heard the joke, she couldn't stop heeheeheeing, it was so funny!" - 当她听到那个笑话时，她止不住地咯咯笑，太好笑了！
I can't help but heeheehee when I think about how my dog managed to knock over the vase.
想起我那狗如何把花瓶撞倒，我就忍不住咯咯笑。
She has this contagious laugh, everyone around her starts heeheeheeing too.
她的笑声很有感染力，周围的人都跟着咯咯笑起来。
Heeheehee, it looks like we're going to have a sunny day today!" - 哈哈，看来我们今天会有一个晴朗的日子！
Whenever we play pranks on each other, we end up heeheeheeing until our stomachs hurt.
每当我们互相恶作剧时，我们最终都笑得肚子疼。