They said they came down from the clouds in their space craft.

他们说他们从所在他们的太空飞船云中降落下来。

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In one task, volunteers wore stereo headphones while in the fMRI machine, and they reported where in space the variety of sounds they heard came from.

在一项任务中，志愿者们在fMRI机器中时头戴立体声音响耳机，由他们报告他们听到的不同种类的声音来自何方。

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Still, for decades, scientists had clues that a vast cloud of antimatter lurked in space, but they did not know where it came from.

不过，数十年来，科学家们发现了表明在宇宙空间中存有大量反物质的线索，但是反物质从何而来科学家们还不知道。

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