单词：filtrations
(filtration 的复数) n. 过滤
[化] 过滤
[化] 过滤
plural of filtration
n. the process whereby fluids pass through a filter or a filtering medium
n. the act of changing a fluid by passing it through a filter
n. the process whereby fluids pass through a filter or a filtering medium
n. the act of changing a fluid by passing it through a filter
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2017CRI中国国际广播电台
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By Tabinda Naeem Washington, D.C. 21 May 2007 Two years ago, the National Academy of Engineering established the Grainger Challenge Prize for Sustainability. This $1 million award was designed to challenge the world's scientists to develop a practica
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2007年VOA标准英语（五月）
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