The symbols of the map key stand for different places.

地图图例代表着不同的地方。

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The key on the left of the map helps you best understand it.

地图左边的键可以帮助你更好地理解它。

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The tutorial also assumes you know some key features of a map: distance, coordinates, and scale.

本教程还假设您了解地图的一些关键特性：距离、坐标和比例尺。

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Neither of these is actually true, as would have been clear to anyone who perused the entire news release or dissected the colour-coded key to the map.

BBC: Harrabin's Notes: Frozen assets

There's a new documentary film, Web sites devoted to the roots of hip-hop, and there's even a map of key spots in the neighborhood's musical past.

NPR: The South Bronx Sound, from Mambo to Hip-Hop

This new interactive map shows where these key investments have been made and the types of projects that will ensure the vehicles of the future are made in America.

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