它可以压缩大部分数据，可以快速查找，而且支持快速的boolean操作。
They are compact for most data, have fast lookup, and allow fast Boolean operations.
自行车快速查找在你的城市，地图和地理位置支持！
Find a bike quickly in your city, with map and geolocation support!
自行车快速查找在你的城市，地图和地理位置支持！
Find a bike quickly in your city, with map and geolocation support!
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