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Names returned by GenTexturesEXT are marked as used ( so that they are not returned by subsequent calls to GenTexturesEXT ) , but they are associated with a texture object only after they are first bound ( just as if the name were unused ) . When a service center is established in mid-year , rates may be set for longer than twelve months so that the end of the first breakeven period coincides with a fiscal yearend . It has been hypothesized that water dissolved within bitumen serves to make oil immiscible within the bitumen , so that it can ultimately be expelled . Instead , after reading the introductory section , skip to the examples at the end so that you get a general idea of the language . You may also want to make the lights turn green at different times , so that a lane with heavy traffic can encounter all green lights .