但是汽车需要油，然而真正的机械应该依靠它们自身运转，所以你需要一台相机。

But cars need oil, but the real operation of machinery should rely on their own, so you need a camera.

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流星就像闪电一样，难以预测，这就是为什么拍摄流星需要一台满意的相机。

Like lightning, meteors are very unpredictable, which is part of what makes capturing them with a camera so satisfying.

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只需要一台照相机、一台电脑和一台配钥匙机，科学家们通过在60米开外进行拍照就可以复制一串钥匙。

Using only a camera, a computer and a key-cutting machine, scientists have duplicated sets of keys after taking snaps of them from more than 60 metres away.

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