ሳይንስየቋንቋ ማስተማሪያው “ቻትቦት” ውድድሮችን እያሸነፈ ነውTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስTesfalem Waldyes Erago10 ነሐሴ 2009ረቡዕ፣ ነሐሴ 10 2009https://p.dw.com/p/2iMphማስታወቂያ