That stress came from unpredictable periods of light alternated with darkness, lasting anytime from three to 24 hours.
应激产生自不定期明暗交替的光照，持续时间从3个小时到24个小时不等。
That stress came from unpredictable periods of light alternated with darkness, lasting anytime from three to 24 hours.
应激产生自不定期明暗交替的光照，持续时间从3个小时到24个小时不等。
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