ሳይንስየኢንፎርሜሽንና ኮሚዩኒኬሽን ቴክኖሎጂ ኤክስፖTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስTesfalem Waldyes Erago27 ሰኔ 2010ረቡዕ፣ ሰኔ 27 2010https://p.dw.com/p/30qToማስታወቂያ