单词：ammonium nitrates
[无化] 硝酸铵，硝安
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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(180) / 评论(0)
澳洲ABC新闻快递2011年
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Lightning Helps Fertilize The Soil Our bodies need protein, and proteins contain nitrogen. The air we breathe has plenty of nitrogen to satisfy our needs. Butthat nitrogen is not available to us directly from the air. The only way we can get nitrogen
发表于:2018-12-31 / 阅读(137) / 评论(0)
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农业与发展
农业与发展