谁能用英语给个experimental science 的定义!

Systematic observation of phenomena for the purpose of
learning new facts or testing the application of theories to known facts; -- also called scientific research.This
is the research part of the phrase "research and development"
Diligent inquiry or examination in seeking facts or
principles; laborious or continued search after truth; as,researches of human wisdom; to research a topic in the
library; medical research.