Konrad Lorenz
Nguồn tin: tieng anh vui
"It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young."
Đăng ký: Tieng Anh Vui
"It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young."
Đăng ký: Tieng Anh Vui
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