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We consider the longitudinal velocity structure function 〈(𝑢‖(𝐱,𝑡)−𝑢‖(𝐱+𝐫,𝑡))2〉/𝜈𝜖−−√, where the subscript ‖ indicates the velocity component in the direction along 𝐫. The Kolmogorov velocity scale is 𝑢𝐾=(𝜈𝜖)1/4. Two relevant subranges...