Describe what the electron blocking layer is, and then express the function of EBL.

说明电子阻挡层是什么，然后表示兼ebl功能。

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The present devices can further comprise an electron blocking layer for improved efficiency.

本元件可能进一步包括一个电子阻挡层用于改进效率。

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The first gas chambers in the same layer form at least one heat blocking layer, and the second gas chambers in the same layer form at least one heat effect layer.

位于同一平面上的第一气室共 同界定出至少一层热阻断层，位于同一平面上的第二气室共同界定出至少 一层热效应层。

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Real DVD also installs a new layer of digital-rights-management (DRM) code on files, blocking users from copying them more than five times to other computers.

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