1.b> ; a passenger train ; a goods / a freight / train ; do you like travelling by train? ?
2.b> , ( i>); the long train of mourners / ; a camel train / ;
3.b> , ( i>); a large train of coaches ; a train of events ; a train of thought / ;
4.b> , (i>);
to bring smth. in it's trainb> .i> / .