Arsenic remained king of bug killers from medieval times up to the mid-1900s, when science found something more effective.
中古时期至20世纪中期，在科学家们找到更有效的方法之前，砷一直是杀死臭虫的王牌。
Arsenic remained king of bug killers from medieval times up to the mid-1900s, when science found something more effective.
中古时期至20世纪中期，在科学家们找到更有效的方法之前，砷一直是杀死臭虫的王牌。
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