Mental illness is only one part of psychology.精神疾病只是心理学的一部分。

pump n.泵

As the handle is pushed down, the pump moves upward pulling water up through the valve.推下手柄后，水泵上升，通过阀门将水抽上来。

She pumped water from the barrel.她从桶里抽水。

punctual adj.按时的，准时的

She is punctual to the minute.她非常准时。

purchase n./vt.买，购买

To be eligible for the lower fare, you must purchase your tickets 21 days in advance.要想有资格获得更低的票价，你必须提前21天买票。

purple n./adj.紫色（的）

The early morning sun cast deep purple shadows.清晨初升的太阳投射出深紫色的阴影。

pursue v.①追赶，追捕②追求，不断努力以取得

The thief was pursued by the policeman.小偷后面有警察在追赶。

Janet pursued her studies even after her marriage.妮特即使在结婚之后也坚持继续深造。

puzzle n.难题；谜

How to get all my things into one trunk is a puzzle.如何把我所有的东西全放进一个行李箱里，这是一个难题。

qualified adj.合格的

A qualified airplane pilot must have good eyesight and hold a license to fly.一位合格的飞机驾驶员必须有良好的视力，并持有飞行执照。

quality n.质量；品质，性质

Look for quality rather than quantity.要注重质量，而不是数量。

quarter n.四分之一

A quarter of a century is 25 years.—个世纪的四分之一是25年。