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The turbulent structure continues to be one of the outstanding unsolved questions in the phenomenology of turbulence.In the high-precision experimental flume, a high-resolution measurement, the range of which being 10 mm * 10mm and the resolution being 0.2 mm * 0.2 mm, as well as a low-resolution one, the range of which being 25 mm * 32 mm and the resolution being 1.0 mm * 1.0 mm, have been conducted in a uniform open channel of 32mm water depth using PIV to measure the turbulent structures.