光周期的暗期长度是决定植物成花的决定因素。
The darkness length in photoperiod is the crucial factor determining the formation of plant flowers.
在电流不平衡时，大约一周一次。稍后，当平衡恢复时，一月一次……月暗期。
With the current imbalance, about once a week. Later, as the balance is restored, it can be once a month… Dark of the moon.
方法：用东莨菪碱造成小鼠记忆损伤的模型，应用被动避暗试验测定潜伏期以评价记忆成绩。
METHODS: Pharmacological model of amnesia in mice was induced by scopolamine. Memory result was evaluated by the step-through latency in the passive-avoidance task.
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