Behind the front end is a layer of middleware that I call the storage logic.

在前端后面是一个中间件层，我将它称作存储逻辑。

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Over that layer is what is commonly referred to as the front end.

在这一层上面的一层常常称为前端。

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Create a new layer and move it in front of the two planets.

新建一个图层，并把它移至两个行星图层的上方。

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Create a new layer and move it in front of the two planets.

新建一个图层，并把它移至两个行星图层的上方。

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