-connect;fittogether;link;marry;mate;joint;associationtrail;linkage;concatenate;concatenation;conjunction;connection;fastening;connecting;connexion;interconnection;jointure;couple;anastomosis;attachment;enchainment;merging;interlinkage;articulation;catination;bridging:
Wheredothetworailroadsconnect[linkup]?两条铁路在何处连接?