○○○topology⪢⪢
Topology is a branch of math, which is kind of like geometry. It studies shapes and spaces, but ones that are arbitrarily stretchy and bendy. It's sometimes called rubber sheet geometry.
http://qindex.info/i.php?x=14104
○○○classify⪢⪢
Another way topologists _____ things are in terms of the number of distinct loops you can draw around the surface of a shape.
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http://qindex.info/i.php?x=5172
○○○intriguing⪢⪢
While the LS3 was far from the first futuristic military technology that DARPA created, with the robot's canine-like shape, it may have been the most _____ .
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http://qindex.info/i.php?x=23660
○○○relentless⪢⪢
These formations were created by volcanic activity and have been shaped over time by the _____ crashing of waves against the shore.
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http://qindex.info/i.php?x=11936