  Heavy hadron production in $e^+e^-$ annihilation is studied in the framework
of heavy-quark recombination mechanism. This mechanism predicts a new type of
3-jet event such as $b\bar{b}q$ or $b\bar{b}\bar{q}$, which is power-suppressed
relative to the standard $b\bar{b}g$ event. Furthermore, heavy quark
fragmentation function also receives a contribution from this mechanism, which
is {\it calculable} in perturbative QCD as long as the momentum fraction $z$ is
not too close to unity. We conjecture that the height of the peak of
fragmentation function for S-wave heavy hadron scales as $\alpha_s^2(m)
m/\lambdaqcd$.
