pioneer

n.先驱，倡导者，开拓者

pineapple, ping, ping-pong, pinion, pink, pink gin, pink-eye, pinkie (also pinky), pinking shears (also pinking scissors), pinkish, pinnace, pinnacle, pinnate, pinny, pinpoint, pinprick, pins and needles, pint, pint-sized, pinto, pioneering, pious, piously, piousness, pip, pip-squeak, pipal (also peepul), pipe, pipe-cleaner, pipe-dream, pipeclay, pipeline, piper, pipette, piping, pipit, pippin, piquancy, piquant, piquantly,