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authority (通常用复数）当局 blacken 变黑 century 世纪 control 控制 desolate 荒凉的 destruction 破坏，毁灭 flood 洪水，水灾 for centuries 几个世纪来 get under control 控制住，得到控制 grass-seed 草籽 in huge q

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农业AGRICULTURE 农业方式Agriculturalpractices 农业设备Agriculturalequipment 农业管理Agriculturalmanagement 农业方法Agriculturalmethods 农业害虫Agriculturalpests 农业生产Agricu

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