人们去旅游有的乘飞机、有的坐火车、坐船、乘公共汽车。对我来说在暑假，最好的方式是徒步旅行。
People travel by plane, by train, by ship, by bus. For me, the best way of traveling on a summer vacation is to go on foot.
由于上个星期我是坐火车去北京出差的﹐并且呆了两天﹐所以没能赶回来给庆祝生日。
Since I went on a business trip to Beijing by train last week and stay there for two days, it is really a pity for me to miss your birthday celebration.
白玲，你是怎么去上海的？我通常坐火车去，有时候坐飞机去。
Bailing, how do you go to Shanghai? I usually go by train or sometimes by air.
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