E mohio ana koe, ko te maaka kirihou te whakapotonga o te maaka whakakotahi, e hipoki ana i te whakakoi whakakoi, i te whakarewanga tohanga, i te wero werohanga, i te pupuhi pupuhi me te hangai pahuka i raro. Ko nga huringa ruruku o te pokepokea convex, pokepokea concave me te pūnaha niao awhina, ka taea e tatou te tukatuka i te raupapa o te p...
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