P字母开头的单词或词组(第31页)：
- pitch
- pitcher
- pitfall
- pithiness
- pithy
- pith
- pitiful
- pittance
- placate
- placebo
- placid
- plagiarism
- plagiarize
- plain
- plaintiff
- plaintive
- plait
- plague
- plane
- planet
- plangent
- plankton
- plenitude
- plaque
- plaster
- platonic
- platitude
- plateau
- plaudit
- plausible
- plead
- pleat
- pledge
- plethora
- pliable
- pliant
- plight
- plinth
- plough
- plod
- plot
- ploy
- pluck
- plumb