  We illustrate how effective field theories work in nuclear physics by using
an effective Lagrangian in which all other degrees of freedom than the
nucleonic one have been integrated out to calculate the low-energy properties
of two-nucleon systems, viz, the deuteron properties, the np 1S0 scattering
amplitude and the M1 transition amplitude entering into the radiative np
capture process. Exploiting a finite cut-off regularization procedure, we find
all the two-nucleon low-energy properties to be accurately described with
little cut-off dependence, in consistency with the general philosophy of
effective field theories.
