但是回音却会久久不散 Second time around
研究表明，一般而言，扭曲会引起本征像散的增加，但却不会影响M2因子。
It is shown that the twist result is an increase of the intrinsic astigmatism, but doesn't affect the M2 factor in general.
研究表明，一般而言扭曲会引起本征像散的增加，但却不会影响犷因子。
It is shown that the twist results is an increase of the intrinsic astigmatism, but doesn't affect the M2 factor in general.
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