“sleeper”的概念、定义、翻译、参考文献-科学参考

单词	sleeper
释义	sleeper [`slēp·ǝr] ^{CIVIL ENGINEERING} A timber, steel, or precast concrete beam placed under rails to hold them at the correct gage.
随便看	velocity pressure velocity profile velocity ratio velocity resonance velocity servomechanism velocity shaped canceler velocity spectrograph velocity-type flowmeter velodrome velour velour paper velum velvet velveteen vena cava vena contracta venation vendaval veneer veneered construction venereal bubo venereal disease venereal wart venetian cloth Venetian red

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。