  Main Result:
  Let $(M,L)$ be a smooth complex polarized threefold. Then the linear system
$| K+tL|$ separates any two different points on $M$ for any $t\ge 6$, where $K$
is the canonical bundle of $M$. The argument in the proof is a variant of
Ein-Lazarsfeld method. Although it is less powerful, it is cheaper, i.e., needs
fewer pages. Unfortunately, at present, I cannot show the very ampleness
because of technical difficulties. Some related topics are also discussed. A
hard copy is available on request to the author.
