词根词缀:astro-, astr-
【来源及含义】Greek: star, stars, star shaped; also pertaining to outer space
【同源单词】apastron, archaeoastronomer, archaeoastronomy, astro-alchemist, astrobiology, astroblast
词根词缀:pass-, pace-
【来源及含义】Latin: step, stepping
【同源单词】apace, astrocompass, compass, compasses, electronic pacemaker, encompass