ሳይንስአፍሪቃየዲጂታል መታወቂያ ምንነት፣ ዝግጅትና ፈተናዉTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስአፍሪቃDemissie,Hanna16 የካቲት 2014ረቡዕ፣ የካቲት 16 2014https://p.dw.com/p/47Tvaማስታወቂያ