WSDL is another common description mechanism for data that must be gathered.
WSDL是为必须收集的数据提供的另一种公共描述机制。
Negative curvature is a little trickier to visualize. The most common description is a saddle.
了解负曲率宇宙要动点脑筋，最常见的描述就是它像马鞍。
Negative curvature is a little trickier to visualize. The most common description is a saddle.
了解负曲率宇宙要动点脑筋，最常见的描述就是它像马鞍。
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