  Considering the $B$ mesonic wave function ${\phi}_{B2}$, the $B$ ${\to}$ $PV$
decays are restudied at the leading order for three scenarios using the
perturbative QCD approach within the standard model, where $P$ $=$ ${\pi}$ and
$K$, and $V$ denotes the ground $SU(3)$ vector mesons. It is found that
contributions from ${\phi}_{B2}$ can enhance most branching ratios, and are
helpful for improving the overall consistency of branching ratios between the
updated calculations and available data, although there are still several
discrepancies between the experimental and theoretical results.
