从而对人类全面认识原子的自电离过程具有重要学术价值.The above achievements have important academic values for enhancing the knowledge about atomic autoionization process.介绍了一种可调谐激光三步孤立实激发方式测量外电场中原子自电离态光谱的技术.We present a isolated core excitation m...
欧洲的一种野豌豆,其花呈紫色,茎干细小; 用作篱障.European purple - flowered with slender stems; occurs as a weed in hedges.欧洲的一种野豌豆,通常被用来制草料和覆盖作物.European vetch much cultivated as forage and cover crops.欧洲的多年生有毒、野豌豆.European perennial toxic ve...
而且, 这一目标或许要早于防止污染.Indeed, this strand may well predate the anti - pollution effort.在世界上大部分地区, 以重量表示价值的金属作为货币使用早于硬币.Metal, valued by weight, preceded coins in many parts of the world.测色学的基本概念早于1853年由格腊斯曼加以阐述.The basic con...
I bought a new cigarette lighter and it broke; now I'm ￡10 out of pocket.我买了新打火机,可是它坏了, 这下白花了十英镑....a cigarette holder.烟嘴He threw the cigarette down and ground it under his heel.他把烟卷丢到地上, 用脚踩灭。Banning toy cigarette ...
若干研究已经发现了两个重要常量。Two significant constants have been found in a number of research studies.其值不变的量称为常量.A quantity whose value remains unchanged is called a constant.在无外力时,质心的速度是常量.The velocity of the center of mass is cons...