a)天文。宇宙
heavenly body (天体) astrology (占星术)
astronomy (天文学) constellation (星座)
galaxy (银河) galactic nebula (银河星云)
satellite (卫星) planet (行星)
asteroid (小行星) meteor (流星)
meteorite (陨石)
(b)化学
hydurochloric (盐酸) sulfuric acid (硫酸)
reduction (还原) oxygen (氧)
hydrogen (氢) nitrogen (氮)
carbon (炭) neutralize (中和)
filter (过滤) deposit (沉淀)
oxidize (氧化) acid (酸)
alkalinity (碱性) saturation (饱和)