在设计这些集成电路时只考虑一两种用途。 圆心在原点,半径为a的圆的方程为x2+y2=a2。 These integrated circuits were designed with only one or two uses in mind. The equation to the circle with the center at the origin and of radius a is x2+yz=a2在设计这些集成电路时只考虑一两种用途。 圆心在原点，半径为a的圆的方程为x 2＋y 2=a2 。 These integrated circuits were designed with only one or two uses in mind. The equation to the circle with the center at the origin and of radius a is x2＋y 2=a2