ሳይንስዝርያዎቹ እስከ 20 ዓመት ያለማቋረጥ ምርት ይሰጣሉ ተብሏልTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስTesfalem Waldyes Erago22 ግንቦት 2010ረቡዕ፣ ግንቦት 22 2010https://p.dw.com/p/2yc2iማስታወቂያ