另一方面，北京的老街道和老房子代表了汗青和文化。
On the other hand, old streets and houses of Beijing represent the history and culture.
在这老街道的中央有一条水道，来帮助雨天时水的宣泄。
There's a channel in the middle of the old street to help water flow away when it rains.
大部分陈旧道路上塞满了汽车；有些老街道上增添了减速通过的大转盘。
Most of the old roads are clotted with cars; others have been reconfigured with pace-slowing roundabouts.
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