今天我们来看看@Lucky小琼子 提的话题：Travel English optimal time 最佳时间 I'm planning my Spring Festival vacation. What's the optimal time to buy a plane ticket? 我在准备我的春节旅游。什么时候买机票最好？ cheap flight tickets 便宜的机票 There is a rumor that the best time to buy cheap flight tickets is on Tuesday.