单词mass number
na.: 【化,物】(原子)质量数
（原子）质量数:
the total number of protons and neutrons in an atom
【物、化】(原子)质量数
原子质量数
质数
Search the site to find in-depth information for the mass number of animals present all over the world.
搜寻网站上找到大规模的动物数量目前在世界各地的深度信息。
Chemical element is the general term for the same type of atoms with the same mass number.
化学元素是具有相同核电荷数的同一类原子的总称。
Bosons include mesons, nuclei of even mass number, and the particles required to embody the fields of quantum field theory.
玻色子包括介子、偶质量数的原子核以及体现量子场论中的场所需要的粒子。
a uranium isotope with mass number 235; capable of sustaining chain reactions.
铀的同位素，原子质量数为，能进行持续的连锁反应。
In modern life, a mass number of people work day and night to seek wealth and as a result they do not pay much attention to their health.
在现代生活中，大量的人们白天工作并且晚上去放纵，并且作为结果他们忽视了他们的健康。
Hydrometeor mass, number, and space charge distribution in a "Hector" squall line
“赫克托”飑线的水凝物质量，数量和空间电荷的分布