ሳይንስቴክኖሎጂ የምርጫ ስጋት ሲሆን To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስYilma Hinz28 ጥቅምት 2011ረቡዕ፣ ጥቅምት 28 2011https://p.dw.com/p/37qNWማስታወቂያ