名词
中文翻译：早发期
同义词：
['early emergence', 'early onset']
例句：
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1.The farmers are worried about the preemergence of frost in the spring.
农民们担心春季的霜冻提前到来。
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2.The researcher found that the preemergence of disease had a significant impact on crop yield.
研究者发现，疾病的早期发生对农作物产量有显著影响。
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3.The farmers need to monitor the soil moisture levels and adjust their irrigation schedules accordingly to avoid preemergence of drought.
农民需要监测土壤湿度水平并相应调整灌溉计划，以避免干旱的早期发生。