科学时代-面向大众传播科学知识、科学方法、科学精神和科学思想的科学普及平台。

科学时代收录了3405121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。

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direct repeat sequence	direct replacement part	direct resistance electroheat installation	direct resistance furnace	direct resistance heating
direct resistance heating equipment	direct respiration	direct response advertising	direct-response advertising	direct-response marketing
direct-response television marketing	direct retention	Direct-revelation game	direct-reverse switch	direct reverse voltage
direct reversing	direct reversing engine	direct reversing gear	direct-reversing turbine	direct riposte
direct riposte thrust	direct riposte with cut	directrix	directrix {conicorbit}	directrix curve
directrix of conic	directrix of cylinder	directrix of linear congruence	directrix plane of quadric cone	direct room load
direct-rope haulage	direct route	direct run	direct running torque converter	direct runoff
Direct-sale	direct sales	direct sales model	direct sampling	direct sampling method
direct sampling system	direct sampling technique	direct sand placing method	direct scanning	direct-scanning camera
direct scheme of digital rectification	direct screening	direct search	direct search method	Direct search methods
direct seeding	Direct seeding	direct selection	direct selling	Direct selling
Direct selling website	direct sensor interface	direct sensory tract	direct sequece CDMA	direct sequence