  An integrating theoretical scenario of superconductivity and superfluidity
has been built. It reduces to the special BCS superconductivity mechanism for
conventional superconductor and to a new theory for high transition temperature
superconductors, which can explain the recent angle-resolved photoemission
experiments and the earlier nuclear spin-lattice relaxation rate experiments.
Both experiments suggest the existence of pairing carriers and the normal state
energy gap well above the transition temperature of superconductivity. A
powerful and workable experiment designed to validate this scenario is also put
forward for the experimenter.
