A wire a mile in length, if electrified at one end, becomes in the very instant electrified also at the other end.
一根一英里长的电线,如果在它的一端通电,电流立刻就会通向它另一端。
2
In those early cold war days, the 800-mile border between East and West Germany was lightly guarded and delineated by a few strands of barbed wire, and thousands fled to the West.