pipe-dream

n hope or plan that is impossible or unworkable 不切实际的希望; 行不通的计画.

pinnace, pinnacle, pinnate, pinny, pinpoint, pinprick, pins and needles, pint, pint-sized, pinto, pioneer, pioneering, pious, piously, piousness, pip, pip-squeak, pipal (also peepul), pipe, pipe-cleaner, pipeclay, pipeline, piper, pipette, piping, pipit, pippin, piquancy, piquant, piquantly, pique, piquet, piracy, piranha, pirate, piratical, piratically, pirouette, Pisa, piscatorial,