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1·It was very crowded on the train as a lot of people had bought tickets without seat reservation.

火车非常挤，因为很多人买了无座车票。

2·No matter how you make your reservation, you always run a tiny risk of arriving at your hotel and finding it overbooked — just like an airline may not have that seat it promised.

不管通过什么方式预订，总是存在这种风险：你达到酒店后，发现它已经超额预定了——就如同航空公司可能并没有它事先承诺的座位。

3·If your reservation status is RQ, especially when you make a connection, you can't get your seat on the flight.

如果订座状况是RQ，特别是中转时，那您就得不到那个航班的座位。

4·Recommend reservation of window seat with view of people come and go. No.

推荐提前预订窗边座位，可欣赏来来往往关乎人的风景。