Wednesday, 30 July 2014

Ivan Pavlov

Nguồn tin: nguontinviet.com

"Perfect as the wing of a bird may be, it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise."

Đăng ký: Hoc tieng anh

TiengAnhVui.Com

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