On a blackboard, he drew five concentric circles.他在黑板上画了5个同心圆。The curvature of the film is concentric with the mirror behind the meniscus.胶片的曲率是和弯月透镜后面的反射镜同心的.The street plan of the city has evolved as a series of concen...
Concentric spheres are parallel.同心球面是平行的.The street plan of the city has evolved as a series of concentric rings.该城市的街道平面图像一圈圈的同心圆环.On a blackboard, he drew five concentric circles.他在黑板上画了5个同心圆。...