“钐-钕定年”的概念、定义、翻译、参考文献-科学参考

单词	钐-钕定年
释义	钐-钕定年 Encyclopedia 理学钐-钕定年释 Sm-Nd dating钐-钕定年在Sm-Nd同位素封闭系统中，利用147Sm放出一个α粒子与能量衰变成143Nd，由衰变定律根据母体147Sm的减少量、放射成因143Nd*增加的量计算系统Sm-Nd年龄的方法。
随便看	railway material management railway mileage railway mobile communication system Railway Nationalization railway operation railway over-zone feeding railway passenger car railway passenger service railway passenger service information system railway passenger station railway passenger tariff railway passenger traffic railway passenger train service work Railway Port of Suifenhe City railway retaining wall struction railwayretaining wall struction railway roadbed problems and remedial measures railway rolling stock railway rolling stock maintenance and repair railway sand prevention railway section block railway shunting hump railway signal railway signal indication railway signaling

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。