《战国策·楚一·张仪为秦破从连横》
如今天下的强国，不是秦国、就是楚国，不是楚国就是秦国，两国相互敌对，互相争夺，势不两立。
 凡天下强国，非秦而楚，非楚而秦，两国敌侔交争，其势不两立。
Nowadays, the strong countries in the world, either Qin or Chu, either Chu or Qin, are hostile to each other, fighting for each other, and cannot stand each other.