The author also mentions a concept of double exposure.

作者还提到了双重曝光的概念。

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This double wall protects the teaching facilities from sun exposure.

这面双层墙体保护教学设施免受阳光直射。

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This double wall protects the teaching facilities from sun exposure.

这面双层墙体保护教学设施免受阳光直射。

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