The results show that,except lichen,moss and shellfish,in fresh water,seawater,fresh snow,sediments,surface soil and marine plants the total As concentrations are lowwer than the backgroud levels in the world.

• 结果表明，长城站地区陆地淡水、海水、新降雪以及沉积物、表土等环境样品中的总砷量低于世界背景水平；