I have always been curious about two things. First, why are traffic jams always heavier on Mondays than on other weekdays? Second, I wonder why traffic is heavier when it rains. I know drivers get more cautious on rainy days, but even when it rains so little that I can hardly feel the raindrops, the traffic gets a lot heavier than on sunny days. Why?
有两件事情一直让我感到好奇。第一，为什么周一的交通拥堵总是比其它工作日更严重？第二，我想知道为什么下雨时交通更拥堵。我明白，司机在雨天开车更小心，但即使是雨小得连雨滴都几乎感觉不到，交通仍要比晴天时拥堵得多。这是为什么呢？
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