词汇	focal hyperbola
释义	focal hyperbola 焦双曲线
随便看	held the follr Held the race in Florida; hold a yard sale held the reins tightly held the ring held the scales even held the stage Held the suspect for questioning held those held out held out against held out for He leapt aside in time for the car to pass He leapt into the river He leapt over the stream He leapt up and down in sheer outrage He learned dispensing He learned his craft from an old master held out on held out the olive branch held out until the last heldover held over held-over heldovers held their sides with laughter