ሳይንስየጤፍ የባለቤትነት መብትን የማስመለስ ዘመቻ To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስTesfalem Waldyes Erago1 ግንቦት 2010ረቡዕ፣ ግንቦት 1 2010https://p.dw.com/p/2xSX5ማስታወቂያ