directrix

"Pit row was abuzz with activity."

"Professor Davies is a learned scholar, renowned for her deep knowledge of ancient history. "

"My sister is a female student in her senior year of high school. "

"The constant noise from the construction site made it hard to concentrate on my homework. "

"My sister is very helpful, especially when it comes to organizing things. "

"The smooth surface of the kitchen table was perfect for setting the dinner plates. "

"The water from the sprinkler followed a parabola as it sprayed across the lawn. "

"The directress of the summer camp organized a fun talent show for all the campers. "

"My son is learning about geometry in his math class, studying how shapes relate to each other in space. "

"From Moscow, the distance is relatively short to Saint Petersburg, relatively long to Novosibirsk, but even greater to Vladivostok."

"The waiter carried the trays of food smoothly, avoiding any spills. "

"to direct the affairs of a nation or the movements of an army"