原文：There are others who board the train and who eventually becom

原文：There are others who board the train and who eventually become very important to us, in turn.
译文：还有些人无法登上火车，他们最终会成为对于我们至关重要的人。
【正确答案】：
改译：还有些人先后登上火车，他们最终会成为对于我们至关重要的人。