People travel by plane, by train, by ship, by bus. To me, the best way of traveling on a summer vacation is to go on foot. 人们会乘坐飞机、火车、轮船...

1．我们出远门总要坐火车或飞机 2．坐火车和坐飞机各有什么利弊 3．你的结论如何 When we go on a business trip, we will be faced with the choice of traveli...