ሳይንስየቤተ-ሙከራ እጥረት ለሳይንስ ትምህርት እንቅፋት ሆኗል To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስTesfalem Waldyes Erago4 ሚያዝያ 2009ረቡዕ፣ ሚያዝያ 4 2009https://p.dw.com/p/2b8Zfማስታወቂያ