This is Clement teaching the equation of SNSD is Chemistry. =)
P.S. There is no real equation of SNSD in Chemistry. There is Sn which is tin, but there is no SD.
THIS IS THE REAL SNSD. A Korean girl group, that goes by the name Girl's Generation or SNSD in Korean (So Nyuh Shi Dae).
Photos taken with my Canon EOS 500D.
SNSD photo taken from the Internet.
iTunes playing Space Cowboy feat. Paradiso Girls - Falling Down.
Sent from my MacBook Pro.