单词：sulphate of potash magnesia
硫酸镁钾
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The little splints of wood which we call matches are made out of deal or pine wood which has been soaked in melted paraffin wax to make it burn more easily. 这种被我们称之为火柴的薄木片由欧洲赤松（松树）制成, 在液体的石蜡
发表于:2018-12-18 / 阅读(169) / 评论(0)
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DEVELOPMENT REPORT – July 22, 2002: Maternal Deaths Study By Jill Moss This is Bill White with the VOA Special English Development Report. Each year, more than five-hundred-thousand women in develop
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This is the VOA Special English Development Report. One of the best ways to protect yourself and other people from getting sick is to wash your hands with soap. To make soap, you need three main things: oil, water and lye. The oil can come from anim
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