Judged against the long boom-and-bust history of the railways, it is not clear how long the good times will last.
Judged against the long boom-and-bust history of the railways, it is not clear how long the good times will last.
从铁路经济繁荣与萧条不断更迭的历史来看，谁都不知道这种好日子会持续多久。