在黑暗和散射光的照射下病斑都能产孢，但在黑暗条件下的产孢量明显高于在散射光条件下的产孢量。
Lesion can produce spores under either direct light or black light, but under blacklight can produce more spore than under direct light.
前散射光的谱强度相对源光谱可能有红移和蓝移，某些条件下还会产生光谱开关。
It is shown that the spectrum may be red-shifted and blue-shifted in comparison with the source spectrum, and the spectral switch may also take place.
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