light-second

英['laɪts'ekənd] 美['laɪts'ekənd]
  • n.光秒
  • hydrogen n.氢
  • light n.光;光线;灯;打火机;领悟;浅色;天窗adj.轻的;浅色的;明亮的;轻松的;容易的;清淡的v.点燃;变亮;照亮adv.清楚地;轻便地
名词 light second:
  1. the distance light travels in a vacuum in one second; approximately 300,000 kilometers