ሳይንስአዲስ አበባ ተቀምጦ የናይጄሪያን ቴክኖሎጂ ማቀላጠፍ To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስTesfalem Waldyes Erago30 መስከረም 2011ረቡዕ፣ መስከረም 30 2011https://p.dw.com/p/36JUhማስታወቂያ