重任: heavy responsibility...
汇: remit; converge; collection; collected things...
过关: to cross a barrier, to get through (an ordeal), to pass (a test), to reach (a standard)...
顺便: conveniently, in passing, without much extra effort...
停放: to park (a car etc), to moor (a boat etc), to leave sth (in a place)...
稀奇: rare, strange...
充电器: battery charger...