  The paper investigates the detailed features of one-dimensional energy
spectra in three-dimensional isotropic turbulence, based on the exact solution
of Karman-Howarth equation. Particular interest will be paid on the degree to
which spectral scaling can lead the spectral data to be collapsed. The theory
appears to be consistent with the wealth of experimental data (G.Comte-Bellot
and S. Corrsin, 1971) at least in low Taylor microscale Reynolds number.
