ሳይንስበምርምር የተሻሻሉ የሰብል ዝርያዎችTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስAlemnew Mekonnen1 ነሐሴ 2011ረቡዕ፣ ነሐሴ 1 2011https://p.dw.com/p/3NVTSማስታወቂያ