单词：ammonium chlorate
氯酸铵
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In business, Optus has called for Telstra's proposals on its participation in the national broadband network to be blocked. Optus' chief executive Paul O'Sullivan says Telstra's current plan for the separation of its retail and wholesale arms wholesa
发表于:2018-12-11 / 阅读(153) / 评论(0)
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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(133) / 评论(0)
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AGRICULTURE REPORT – March 12, 2002: Carbon Dioxide and Crops By George Grow This is the VOA Special English AGRICULTURE REPORT. Increasing levels of carbon dioxide gas in Earth’s atmosphere have
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