atom n. 1.原子。 2.微粒;微量。 chemical atoms 原子。 physical atoms 分子。 have [there is] not an atom of 一点也没有。 break to atoms 粉碎 (The vase was broken to atoms. 花瓶敲得粉碎)。
Test method for atom percent fission in uranium fuel radiochemical method 铀燃料中原子裂变百分率的测试方法
Test method for atom percent fission in uranium and plutonium fuel mass spectrometric method 用质谱法测定铀和钚燃料中原子裂变百分率的试验方法
Standard test method for atom percent fission in uranium and plutonium fuel neodymium - 148 method 钕- 148法测定铀和钚燃料中原子裂变百分比的标准试验方法
The relative content of a particular element or constituent ( i ) within an alloy , usually expressed in weight percent or atom percent . also call it concentration 合金中某一元素或组分的相对含量,通常用质量百分数或原子百分数来表示。也称为浓度。