ሳይንስየ2019 የኬሚስትሪ ዘርፍ የኖቤል ሽልማት አሸናፊዎች To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስTesfalem Waldyes Erago5 ጥቅምት 2012ረቡዕ፣ ጥቅምት 5 2012https://p.dw.com/p/3RP4Nማስታወቂያ