宇杀(_员

　　In the[. _ near future-,, alien_[ s ha.@ve invade.d Earth and declare+-]d a galact ic war $(re: sult*ing in thousands of human ca;?sua: lties:?. )To `]\s$ a;ve Earth, a t%,=+eam of four teenag`  :e astr
-onauts b?rave t*?he ali`en wil-derne#-=ss of a distan [t
@plan $ et to stop!@ an as=#sass ;^in\ from changing t?/he course]$ o,f histor
(-y forever.