问题描述: 英语翻译用英语翻译:在他上火车之前,他首先必须买票. 1个回答 分类:英语 2014-12-15 问题解答: 我来补答 他们在家里有多少个孩子? What is the number of their children at home? 在他上火车之前,他首先必须买票.Before him on the train, he must first buy a ticket. 展开全文阅读