"Raunchy one-liners relieve the fear of the unknown that menaces this mean, terrific team. Only the sequel isn't as shocking because we know a little about the monster now. "Aliens" can't top the original caesarean scene -- the monster tearing through the abdomen of its human host. But this time there are more parasites. If "Alien" was a cancer metaphor, "Aliens" is more like AIDS. There may be no defense, though there are plenty of skirmishes. Then there's the red-blooded feminism. Basically it's "Rambo" for her, with Weaver's demeanor steelier than Stallone's. But she is a woman. And that means she's got to balance a career and mothering when she takes a spunky nine-year-old space orphan under her wing."