If it is there, use it to get more information on each of the venues retrieved from Foursquare.
如果有，就用它来获得从Fours quare检索来的每个场所的更多信息。
The referent of a WeakReference is set at construction time, and its value, if it has not yet been cleared, can be retrieved with get .
WeakReference的referent是在构造时设置的，在没有被清除之前，可以用get获取它的值。
The referent of a WeakReference is set at construction time, and its value, if it has not yet been cleared, can be retrieved with get .
WeakReference的referent是在构造时设置的，在没有被清除之前，可以用get获取它的值。
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