求一篇关于城市交通的英语作文，100词以内，不要复制

There have been a lot of changes in the city's transportation. Nowadays, there are more people and as a result, there are more cars, more underground subways and more bikes. During rush hours, it is hard to get on the bus or the subway and even harder to get off after more and more people get on. Bikes are the better means to get around the city because they are easy to park. Besides, they don't cause as much pollution. There are many people who drive in violation of the traffic rules, so it is important to keep ourselves safe on the street.

城市的交通有很大的变化。现在，人越来越多，所以有更多的轿车，更多的地铁和更多地自行车。在高峰时间，上公交车或者地铁很难但是当更多的人上车后下车会更难。自行车是比较方便的在城市里穿梭的交通工具因为他们很容易停放。此外他们不会引起环境污染。有很多人违反交通规则行驶，所以在街上保护我们自己的安全是很重要的。

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