磁力线 [- - xiàn]magnetic lines of flux; 〖电磁〗 magnetic lines of force; line of magnetic force; magnetic-curve; magnetic line 磁力线重接field line reconnection磁力线重联field line reconnection磁力线冻结frozen-in field line磁力线检验magnetic flux test磁力线图magnetic figure磁力线湮没field line annihilation