n. 火车；行列（train的复数形式）

n public transport provided by a line of railway cars coupled together and drawn by a locomotive

n a sequentially ordered set of things or events or ideas in which each successive member is related to the preceding

n a procession (of wagons or mules or camels) traveling together in single file

n a series of consequences wrought by an event

n piece of cloth forming the long back section of a gown that is drawn along the floor

n wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed

v create by training and teaching

v undergo training or instruction in preparation for a particular role, function, or profession

v develop (children's) behavior by instruction and practice; especially to teach self-control

v educate for a future role or function

v teach or refine to be discriminative in taste or judgment

v point or cause to go (blows, weapons, or objects such as photographic equipment) towards

v teach and supervise (someone); act as a trainer or coach (to), as in sports

v exercise in order to prepare for an event or competition

v cause to grow in a certain way by tying and pruning it

v travel by rail or train

v drag loosely along a surface; allow to sweep the ground