sharing an axis (= central point)

coaxial lines 同轴线

a coaxial cable has two concentric wires (= wires that share a central point) to conduct the signal, separated by an insulating layer

Cable TV channels and internet services are usually transmitted to a home or business via coaxial cable. 有线电视频道和互联网服务通常通过同轴电缆传输供家用或商用。