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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。

free phenol freephone free physical block free pilotage free piloting piston
free piston free piston air compressor free piston compressor free-piston compressor free-piston engine
free piston engine free piston gage free piston gas generator free piston gas generator set free piston gas turbine
free-piston gauge free piston gauge free-piston manometer free pitch free place
free play free play exercise free play of steering wheel free-play scenario free plunger
free point freepoint indicator free-point tester free pollination free polyol
free polyvalent metal cations free pool Freeport free port free port area
free port area; free quarter free port town free port zone free position free position of pendulum
free power turbine free pratique free pratique; white pratique free price free probe
free product free progressive wave free prostate-specific antigen {=PSA} Free pupa free pupa; exarate
free push button free queue element{=FQE} Freer free radially free radiation frequency
free radical free radical acceptor free radical catalyst free radical chain free radical chain reaction
free radical chain stopper free radical curing Free radical{=FR} free radical inhibitor free radical initiation
free radical initiator free radical mechanism free radical polymerization free-radical polymerization free radical polymerization; radical polymerization
free radical polymerized free radical reaction free-radical reaction free radical reaction; radical reaction Free radical reactions
free radicals Free radicals free radical scavenger free radical suspension polymerization free radical termination
free radical theory free radicle theory free radius free reading period free reading time
free recall free recall method free record queue free reed free-rein leadership
free release Free reserve free reserve free residual chlorine free resolution
free response free return trajectory free rhythm free ribosome Free ride
Free rider free rider free rider effect Free-rider problem free riding
free-riding free riding effect free-rise-and-fall experiment free rocket free roll
free roller free roller gate free rolling wheel free Rossby wave free rotating propeller
free-rotating seal free rotating speed free rotation free routine free routing
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