Therefore, electrons cannot be pictured as localized particles in space but rather should be thought of as" clouds" of negative charge spread out over the entire orbit.

因此电子不能描述为空间所处位置的微粒，只能认为负电荷占整个轨道扩散开来的“云”。

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The enhancement is related to the electromagnetic coupling of the localized surface plasmon resonance of silver metal particles and the surface polariton of the silver substrate.

增强主要是由于金属银粒子与银基底表面的电磁耦合，即银粒子的定域表面等离子体共振与银基底的表面等离子激元间的相互作用。

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