He didn't even know what the slices of brown stuff were, for he had never seen toast before.

他甚至不知道这一片片棕色的东西是什么玩意儿，因为他以前从未见过吐司。

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Travelling Aussies are often found with a sneaky pot of the sticky, salty brown stuff in their backpack.

在外旅行的澳大利亚人也总是会在背包里偷偷背上一罐粘粘的深棕色咸味酱。

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A Polish biochemist named Casimir Funk isolated what was in the brown stuff. It turned out to be thiamine.

一位名叫 卡西米尔·冯克 （Casimir Funk）的波兰生化学家，从糙米中分离出了一种被后人命名为 硫胺 （thiamine）的物质。

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When the brown stuff hits the fan, mobile phones and coffee cups have hit the wall, sources say.

BBC: Jim Fitzpatrick

Mr. ABRAMS: The press said: Gee, this brown cigar stuff looks good.

NPR: Major League Baseball to Investigate Steroid Use

Which makes sense, considering that it's the stuff that coal is made of (lignite coal is soft brown coal formed from geologic pressures on forests that died millions of years ago).

FORBES: Ethanol