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range pole
rangeland
Ranger
ranger
ranging pole
rangiora
Rangitaiki
Rangitata
Rangitikei
Rangitoto Island
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random walk

ran·dom walk (plural ran·dom walks)


noun 
Definition:
 
model with independent successive steps: a mathematical model applicable to various processes, such as diffusion, in which the direction and sometimes the magnitude of successive steps are determined by chance

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