concentric
adj. 同轴的；同中心的
例句
On a blackboard, he drew five concentric circles.
他在黑板上画出五个同心圆。
《柯林斯英汉双解大词典》
Bone growth in reptiles is periodic in nature, producing a series of concentric rings in the bone, not unlike the growth rings of a tree.
爬行动物的骨骼生长在本质上是周期性的，在骨头上产生一系列的同心圆，就像树木的年轮一样。
The same catalogue included a type of two-pole concentric plug and socket.
相同的目录包括一种两极同心插头和插座。
