Chương trình Thực phẩm & Đời sống

https://www.youtube.com/attribution_link?a=NpP_jP6hxw4uq3WN&u=/watch%3Fv%3DsOzPKCy6zjk%26feature%3Dem-upload_owner

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Mai Thanh Truyết

http://maithanhtruyet.blogspot.com/

"Energy can neither created or destroyed, 

 it only transforms from one form to another" - Anonymous