P字母开头的单词或词组(第13页)：
- propeller
- proposition
- propulsion
- photoelectric
- photographic
- proton
- physically
- physiology
- publicity
- puff
- piston
- paste
- pasture
- payment
- pickup
- pickpocket
- plentiful
- plow
- porch
- presently
- prisoner
- procession
- proficiency
- pail
- prospect
- passerby
- participate in
- pass off
- preside over
- prey on
- pant
- perplex
- put into effect
- play a role in
- put to use
- prey
- probe
- prolong
- prominent
- prosper
- provoke
- pay back
- pull out
- pull up