如果汽车普及了，很可能会出现交通堵塞。
If the cars become popular, there is likely to beair traffic jam.
汽车普及后，就不再使用马和马车了。
When automobiles become popular, the use of the horse and buggy passed away.
毕竟，自从汽车普及之前，已经有了一些方便人的规划。
After all, many have had the same pedestrian-friendly layouts since before the popularization of cars.
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