单词：brakhausen-kurz oscillator
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841 、 埋头铆钉 countersinkheadrivet 842 、 埋头锥孔 countersink 843 、 埋头螺栓 countersinkheadbolt 844 、 埋头螺丝 countersinkheadscrew 845 、 埋头钻 countersinkdrill 846 、
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Merkel Under Pressure After Migrant Influx 难民涌入给默克尔带来压力 BERLIN German Chancellor Angela Merkel is facing mounting political pressure over the number of migrants arriving in her country with regional authorities demanding that
VOA标准英语2016年(一月)
很多同学在外国同事报自己的用户名或是邮箱地址的时候很头疼，因为他们的地址里有下划线之类的各种符号，这个用英语要怎么说呀？而且这些符号的出现频率远远高于你的想象，平时不注
美国文化脱口秀
Keeping Time With Quartz Most people know that wrist watches commonly contain quartz. In fact, if you wear a watch, chances are its a quartz watch, since most watches is made today use quartz. But, you may not know what quartz has to do with keeping
英语听力文摘 English Digest
This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? Germanys Harald zur Hausen and Frances Luc Montagnier and Francoise Barre-Sinoussi share the 2008 Nobel Prize in Physiology or Medicine, awarded October 6th. Barre-Sin
Scientific American(十)月
Aging HIV/AIDS Survivors Create New Class of Patients In sub-Saharan Africa, antiretroviral treatment (ART) has reduced the mortality rate among HIV-infected people by 20 percent. Many of the people receiving treatment who are now in their forties ar
VOA标准英语2012年(四月)
By Carol Pearson Washington, D.C. 08 October 2009 A premature infant getting specialized hospital assistance after birth A new study shows that more than a million babies die each year because they are born too soon, and that the highest rates of pr
VOA标准英语2009年(十月)