"Do not be nervous! Maintain normal breathing. Do not hold your breath." This is what most Scuba Diver coaches would say to students. In order to relax the students and understand that it is easy to take advantage of scuba breathing, Mental disorder that automatically closes when the water exceeds the eye.
This sentence is usually ------ "the beginning" is very effective! Maybe you just finished the water diver course in this way.
As your diving experience accumulates, you are gradually diverting attention to other areas - such as more sophisticated underwater skills, moving bodies, underwater mirror adjustments, and neutral buoyancy control. Suddenly found that breathing underwater is not "complete" as mentioned above: to maintain normal breathing, do not hold your breath. So simple!