Engineers,inventors, students and others come together to design and test different methods and materials for improving stoves.
VOA: special.2010.02.01
All right. So we've got it now let's test it. So we're going to do here we're going to run compare methods.
很抱歉,那些坐在后面的同学,想往前面来的请自便,我们已经做好准备,让我们去试一下,我们接下来将要做的就是。
The W.H.O.announced ten projects to test non-chemical methods for fighting mosquitoes.
VOA: special.2009.05.26
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