单词	quadrant
释义	quadrantquadrant /ˈkwɑdrənt/ noun [countable] Etymology ETYMOLOGYquadrant Origin: 1300-1400 Latin quadrans fourth part 1 math, geometry a quarter of a circle2an area that is one of four equal parts that a larger area is divided into:  the town’s southwest quadrant3science, physics an instrument for measuring angles, used when sailing or when looking at the stars4math, geometry one of four equal parts into which a plane is divided by two straight lines that cross each other at an angle of 90 degrees
随便看	Pulitzer, Joseph Pulitzer Prize pull pullback pull-down pullet pulley pull factor Pullman pull-on pullout pullover pull-up pulmonary pulp pulpit pulpwood pulpy pulsar pulsate pulsating pulsating theory pulsation pulse pulverization

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