撤换: to dismiss and replace (sb), to replace (sb or sth)...
不惜: not stint, not spare, not hesitate (to do sth), not scruple (to do sth)...
叫好: to applaud, to cheer...
公交车: public transport vehicle, town bus...
使唤: to order sb around, (coll.) to handle (a draught animal, tool, machine etc), Taiwan pr....
首先: first (of all), in the first place...
海报: poster, playbill, notice...
披: to drape over one's shoulders, to open, to unroll, to split open, to spread out...
床位: bed (in hospital, hotel, train etc), berth, bunk...
严谨: rigorous, strict, careful, cautious, compact, well-knit...
