单词:Potash-Jarosite
单词:Potash-Jarosite 相关文章
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
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
By Stefan Bos Budapest 08 July 2006 Polish President Lech Kaczynski, left, and his twin brother Jaroslaw Kaczynski are show in this 2005 file photo The twin brother of Poland's president has been chosen by the governing Law and Justice party to take
By June Soh Washington, DC 06 September 2006 watch Language Barriers report Leticia Menjaros(middle), interpreter, helps patient and doctor communicate A recent study says language barriers are causing problems in U.S. hospitals as the population ge
By Cathy Majtenyi Nairobi, Kenya 06 December 2007 Kenya's capital, Nairobi, is home to one of Africa's largest dumpsites. A recent United Nations study found that nearly half of the children surveyed who live near the dumpsite suffer from serious med
天文学在我们听力讲座里面算是出现频率较高的话题了,在目前所有的176篇讲座里一共有14篇天文学类的文章,且都是比较有难度的,可以说,天文学类算是我们讲座里的一个重点也是难点了。