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科学时代收录了1160609条科普词条,基本涵盖了常见科普常识及英语词汇的翻译,是科学学习和研究的有利工具。

secondary standard solar cell secondary star secondary state secondary state secondary station
secondary steam secondary sterility secondary stock secondary storage secondary stress
secondary stress secondary stress secondary stress secondary strike secondary structure
secondary structure secondary structure secondary structure secondary succession secondary succession
secondary succession secondary succession secondary succession secondary surveillance radar secondary surveillance radar--secondary surveillance radar(SSR)
secondary surveillance radar(SSR) secondary symptom secondary task Secondary Teachers College Rules secondary teachers school
secondary teacher training school secondary technical education secondary technical school secondary technical school for peasants secondary tense
secondary thermocline secondary thrombocytosis secondary tide secondary tide station secondary timber
secondary time effect secondary tint secondary trait secondary traits secondary transaction
secondary treatment secondary treatment secondary treatment secondary treatment secondary trunk road
secondary twin secondary unit secondary unit secondary urbanism secondary urbanism
secondary use secondary ventilation secondary vent stack secondary vocational school teacher evaluation secondary wall
secondary water pollution secondary wave secondary wave secondary wave secondary wave
secondary wavelet secondary winding secondary winding secondary wiring secondary worker
secondary X-ray secondary xylem secondary yolk stage secondary(sampling)unit second assistant camera
second assistant director second assistant editor Second Athenian Confederacy second axiom of countability second axiom of rheology
second ballot second banana second beneficiary second beneficiary second best
second bill of exchange second board second board market second bonding Second Book of Discipline
Second Book of the Kings second boundary condition second boycott second Brillouin zone second-but-better new-product development strategy
second calculation second candling egg second carrier second carrier second Castigliano theorem
second chamber second-chance education second class second-class cabin second-class constraint
second-class failure second comparison test second cosmic velocity second cosmic velocity second cosmic velocity
second course second cousin second Cousin problem second cover second cover
Second Crusade second-day air second-day delivery second death insurance second deed of trust
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