  We show that a $PL_{\infty}$-algebra $V$ can be described by a nilpotent
coderivation of degree $-1$ on coalgebra $P^*V$. Based on this result, we can
generalise the result of T. Lada and show that every $A_{\infty}$-algebra
carries a $PL_{\infty}$-algebra structure and every $PL_{\infty}$-algebra
carries an $L_{\infty}$-algebra structure. In particular, we obtain a pre Lie
$n$-algebra structure on an arbitrary partially associative $n$-algebra and
deduce pre Lie $n$-algebras are $n$-Lie admissible.
