托福真题词汇20组（下）词汇表

direction elliptical gravitational collectively numerous satellite planet existence postulate spectrum nitrogen oxygen residual correspondence gallium isolate proper analogous aluminum hence neutron isotope abundance anomaly subsequent tin cadmium selenium arsenic indium chemist forerunner column vertical assemble alkali horizontal fix repeat successive similarity proposal descriptive interplay illustrate achievement nucleus proton atomic arrange element recurrence chart anxious voyage populous empire entrepreneurial loyalty steady superiority tolerance cement adaptive calculating individualistic typical stance peculiar characterize mercantile wealth distinction minimize consensus elect popularly harmony flourish fellowship quasi multiplicity confederacy tribal shepherd international domestic professional maintenance aid essentially egalitarian craft mode partnership conceptualize repudiate mutual bound kinship neighborhood sect religious guild establishment blur rank owner master tutelage piecework artisan production reliance gem timber merchant civilization expedition import important lapis precious jade tool mirror volcanic obsidian demand ore metallic sandstone geology partly access restrict negotiate caravan economy urban mainstay trade essential lake iceberg calve exceed sufficient precipitation climatic input outward interlock stage granular lessen firn grain rounded compact transform crystal hexagonal snowfall glacier site dramatic boundary span deposit sedimentary globe crust iridium starvation massive photosynthesis reduce settle particle darken atmosphere debris spew collision comparable diameter estimate collide asteroid devastation widespread meteor deflect companion give rise to recurrent drastic dinosaur periodically recur episode destruction hunt simultaneous different extend gradually take place suddenly propose feed bottom insect cooperation evolution continent position change current ocean fluctuation seasonal progress rate die out marine fossil perish species unfamiliar attract geological interval extinction among unique accomplish blood comparatively twice volume pick up by-product feat adulthood immense switch conserve applied