“黑便士”的概念、定义、翻译、参考文献-科学参考

单词	黑便士
释义	黑便士 Encyclopedia 工学邮资凭证释 Penny Black Stamp黑便士 1840年英国发行的世界上第一枚邮票。5月1日发售，5月6日正式使用。面值为1便士，用黑色油墨印制。
随便看	mechanical equilibrium mechanical equilibrium condition mechanical equivalent mechanical equivalent of heat mechanical equivalent of light mechanical excavator mechanical external cutting operations mechanical failure mechanical fault diagnosis mechanical features mechanical feedback mechanical fiber separation mechanical filter mechanical finger mechanical flotation cell mechanical function design mechanical governor mechanical grate incinerator mechanical gyroscope mechanical handling mechanical hemolytic anemia mechanical hydraulic control system mechanical impedance mechanical index mechanical index, MI

科学参考收录了854744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。