Pavlov, an outstanding Russian physiologist, famously said that failure in experiments may be the beginning of discovery. Correct.

Pavlov is an outstanding physiologist who has made important contributions in the field of experimental physiology. His famous saying "failure in experiment may be the beginning of discovery" emphasizes the value of failure in scientific experiment.

in scientific experiments, failure is common. Sometimes, the experiment may be biased, or the results are inconsistent with expectations. However, these failures do not mean the end of research, but may be the beginning of exploring new things.

By analyzing the reasons of failure, scientists can dig deep into the essence behind the phenomenon, find new problems, put forward new hypotheses and further carry out experimental verification.

Pavlov's famous saying reminds us not to be afraid of failing in scientific experiments. In fact, every failure provides scientists with an opportunity to learn, help them better understand problems and promote scientific progress. Therefore, we should see the value of failure, learn from it and move on.

Pavlov's outstanding contributions in other fields are as follows:

First of all, he has made outstanding contributions in blood circulation physiology, digestive system physiology and higher nervous activity physiology. His research involves many departments of physiology, including blood circulation, digestion, secretion, higher central nervous activity, neurohumoral regulation of body functions, labor physiology, comparative physiology, pharmacology, experimental pathology, therapeutics and so on.