2. Zhuge Liang is diligent in observation and thinking, and made an eight-array diagram and a wooden cow.
3. Ma is good at observing market trends, founded Alibaba and became the richest man in China.
4. Archimedes was diligent in thinking and observing, and put forward the buoyancy theorem.
Newton observed the apple falling to the ground and found that gravity was fixed.
Darwin was diligent in observation and put forward the theory of evolution.
7. Watt was diligent in observation and thinking and invented the steam engine.
8. Galileo was observant, made an iron ball experiment and put forward the concept of universal gravitation.