圆C1:x∧2+y∧2+4x+3=0 :(X+1)²+Y^2=1
C1(-1,0),R1=1
∵圆C2与圆C1外切且与直线L：x＝1相切
当C2在x轴上时,
C2(1/2,0),R2=1/2
圆C2:(x-1/2)²+y²=1/4
任意时刻设C2(x,y)(x