Robots are the stuff of science fiction.

机器人是科幻电影里的素材。

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ARTIFICIAL hearts have long been the stuff of science fiction.

人造心脏一直都是科幻小说中的东西。

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Self-replicating robots are no longer the stuff of science fiction.

自此，可自我复制的机器人不再是科幻小说中才会有的情节素材。

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College students do not have a science of this at all, they just pour the stuff down their throats with the goal of becoming drunk as fast as they can.

大学生完全不懂喝酒的学问,他们只是把那玩意儿灌入喉咙里,以尽快把自己灌醉为目的

耶鲁公开课 - 古希腊历史简介课程节选

What is less black and white, however, IS where reality ends, and the stuff of science fiction begins.

ENGADGET: Alt-week 2.2.13: SpaceLiners, building a brain and the man made multiverse

And the devices now routinely do tasks that would have been the stuff of science fiction a generation ago.

FORBES: Magazine Article

But given time, nanotechnology may yet demonstrate that it has more to offer biology than the stuff of science fiction.

ECONOMIST: Nanotechnology in biology