I'm the heterogeneous system, soft stuff, hard stuff, liquid stuff.

我是非均匀系统，有软的物质，硬的物质，液体物质等。

麻省理工公开课 - 热力学与动力学课程节选

It's hard to write a lot of stuff in a language that you're not as familiar with,

用你不熟悉的语言写论文真的很难，

选择国际学的理由 - SpeakingMax英语口语达人

Philosophy is hard stuff to read.

哲学是很难读懂的东西。

耶鲁公开课 - 死亡课程节选

This is different from the hard disk, which is where files and stuff are permanently stored.

这个和硬盘是不一样的，那是存储,文件之类的东西的。

哈佛公开课 - 计算机科学课程节选

It's really hard to think of all stuff off the top of my head.

脑子里一时想到的都说出来还真难呢。

只要是音乐就好 - SpeakingMax英语口语达人

It was hard to piece all of this stuff together.

这个解释稍微有点难理解

耶鲁公开课 - 欧洲文明课程节选

they were having hard time getting their day- to- day stuff done,

他们在日常生活中遇到了很多的困难，

帮助多文化的家庭 - SpeakingMax英语口语达人

It's hard-hitting stuff.

这需要比较强的承受能力。

耶鲁公开课 - 旧约导论课程节选