two-way alternate communication

API - application program interface bolt out of the house Chimonanthus nitens cobble stone pavement colonial animal crosshead shoe oil cup dump rubbish in the neighbor's yard fine phase shifter Hartree-Fock-Roothaan equation Helicobacterium hub lift incontestable clause parrotfeather sakuraboshi skin sensitizing antibody transmittal-carrier operation undeceivable untwine usable width of lock chamber xylovitrite