单词：percolation filtration treating
单词：percolation filtration treating 相关文章
Beijing will launch a pilot program to equip schools and kindergartens with air filtration devices. Smog has been a significant issue in the Chinese capital this winter. I was coughing just now, I always wear mask, from school to home. The air is cho
2017CRI中国国际广播电台
SHIJIAZHUANG, Dec. 25 (Xinhua) -- A listed Chinese herbal medicine maker on Thursday said its compound flu formula has received approval from the U.S. Food and Drug Administration (FDA) for clinical tests. The decision has paved the way for Chinese h
英语新闻
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
2007年VOA标准英语（五月）
Yaya v Pep: The Tale of an Angry Agent FRI 23 SEP 2016 Yaya Toure's agent accuses Pep Guardiola of treating his players like dogs.
英语听力精选进阶版
你也许觉得打招呼是很简单的一件事，不就是Hello。 How do you do? Howare you? Im fine, thank you. And you?吗？ 没错，你这样去打招呼也没有什么问题，但真正的美国人日常生活中打招呼是不是也这样呢？
英语口语
Yaya v Pep: The Tale of an Angry Agent FRI 23 SEP 2016 Yaya Toure's agent accuses Pep Guardiola of treating his players like dogs.
英语听力精选进阶版