beacon, ['bi:kən] n 灯塔(位于海岸,用以导航);烽火(警告敌人的接近) 【例】Fires beaconed the darkness 火光驱散了黑暗。 【记】bea=bead珠子,夜明珠,con=can能。夜明珠能在晚上导航。 烽火...
This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. Got a minute? Man-made light sources can really throw animals for a loop. Moths can't tear themselves away from lightbulbs, and newly hatched sea turtles often shun moonlit ocean...